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Answer it now.

It's midnight.

Can I tell him that

I'm in my bed now?

Just pick up. It's your work. Work.

What's wrong?

Check your email.

There is a document.

Translate it before tomorrow morning.

We need it for the experiment in the afternoon.

Tomorrow morning?

Yes. Tomorrow morning.

Well, Yang.

This is

a little bit unreasonable.

I can't really finish it

by tomorrow morning.

We need it for the experiment in the afternoon.

Yang. Yang...

Yang?

He just hung up on me.

You poor thing.

So much content

for you to translate.

It looks like you won't be able

to drink tonight.

So I'll drink it for you.

I will.

You can still drink?

Don't mind him.

I stayed up with her.

I made meals for her,

and I'm waiting for her at the finishing line.

But now,

look what I've got.

She is changing her direction now.

Yang Lanhang,

you are

a super idiot.

Emotional.

This is exactly puppy love.

It's urgent, huh?

You want me to give you

tomorrow morning, huh?

Fine.

I'll send it to you now.

Immediately.

I can finish it in five minutes.

Five minutes.

Five minutes.

So fast?

I'm so smart.

Trying to embarrass me, huh?

Time for bed.

Mom.

Mom.

Mom.

Mom.

Mom.

Mom.

Mom. Mom.

Mom.

This is for you.

Take the money

and buy a new heart

for your mom.

You can just buy a new one

if there is something wrong with the heart.

Your mom won't die.

Is that true?

Yes.

I was born with a defective heart.

I saved the money

in order to buy a new one.

Take it.

What are you gonna do

if you give me the money?

Will you die

if you don't have a new heart?

I'll live.

I'm a genius.

I'll pay you back

when I make enough money.

Let's make a deal.

You can't die.

How has this

little genius been?

Are you still alive?

Come down now.

It smells good.

Come on.

So sweet of you.

Is it good?

This is unusual.

You're not going down now?

What's the rush?

I stayed up

until 5:00 in the morning

just in order to translate the document for him.

Let me take a look.

This Yang Lanhang....

I have to apologize for

having said he acted like

the aged yesterday.

The God is

so unfair.

He is a genius

and has a good family background.

More importantly, he looks

really handsome.

Unfair.

Unfair.

Maybe he has some

serious defects

considering his personality.

I'm telling you.

The God is very fair.

Why are you so angry

early in the morning?

He didn't turn you in

to the professor.

I'm upset just by seeing him.

Alright. Stop eating.

Hurry.

Go down now.

I'm telling you,

I'm a compassionate person

and I can't bear to see a handsome guy being tortured.

Just go down.

Why did you sit down?

Just go now.

Stop. Stop.

Not having breakfast is bad for the stomach.

I'm eating the egg.

Do you have to?

So how long do you plan to

keep him waiting?

Let him wait.

Cheers.

Get in.

The document....

I received.

I'm talking to you.

Yang Lanhang,

why do you bring me here?

What is the difference between

this kind of material

and that of former heart valves?

The difference is here.

Granny Wu,

Look.

The difference is....

This is beyond my comprehension.

Doctor Li,

I can't understand this.

But I trust you.

Just tell me.

Should I sign it?

Whatever it is,

I'll do as you say.

Now is not the time for signing.

I thought signing is necessary before an operation.

I know it.

My granddaughter

should be here

since this is important.

Yang went to look for her

and they will be here soon.

What are you doing?

You're here.

Wu Chunhua.

Wu Chunhua.

Why are you here?

What are you doing?

Your grandmother

asked me to bring you here.

When did you...?

Was it the new year celebration?

Yang will tell you

about this later.

Now that you are here,

you should know this.

I have approved, anyway.

What have you approved?

An operation.

Replacing heart valves.

Look at this.

What heart valves?

Look,

your grandmother wants to

participate in our clinical trial.

But the clinical trial is....

I disagree.

Why do you disagree?

It's not your operation.

It's mine.

Do you know what

a clinical trial is?

I will have this operation.

Do you know

what a clinical trial is?

I said no. Period.

I said yes. Period.

I trust Yang

and I trust Doctor Li.

What's wrong with you?

You trust them

instead of me?

Yang Lanhang,

what did you tell her?

She fears operations the most.

You can come at me

if you are not satisfied with me.

She is old.

Almost 70 years old.

Will you save it, OK?

You...! You...!

Go.

You...

Let's go. Just go.

Listen to me.

Do you know how long

this heart will keep me alive?

I need this operation,

immediately.

Do you know that I

just want to sleep well?

I just want to live at my own will.

Do you know that?

Grandma.

Grandma, it's fine.

Let me explain to Lingling.

Why did you bring me here?

Do you know why I

brought you here?

This is the place where

your grandma almost jumped down the other day.

What are you talking about?

I came to find Doctor Li that day,

because we were having discussions

about our scientific research.

It's classified,

so we decided to meet

in that meeting room.

It is on the top floor

and needs an in-house lift

to get there.

So usually no one

will show up there.

But I saw

an old woman

stumbling her way up.

In the first place,

I thought she was lost.

So I followed her.

I didn't know her

to be your grandmother.

Granny.

Granny.

Granny, calm down.

Step aside.

Leave me alone.

Let go of me.

Calm down, granny.

Let me die.

Granny, just calm down.

Granny.

It's alright. It's alright.

It's fine.

Granny, it's OK.

Granny, calm down.

Everything is fine.

It's fine.

No way.

Why did she do that?

Just because of a cellphone?

She wants to die

just because of a cellphone?

You must be lying.

We've been good.

She did run away

on that day

because of a cellphone,

and we've never had

another fight

since that day.

I don't believe it.

You never saw her swear at people.

It's true. She...

she is quite energetic

when she swears at people.

I don't have to lie to you.

If you don't believe me,

you can check the surveillance video.

As for the reason,

it's not about the cellphone.

Actually, I think...

I think your grandmother is

suffering from deep depression.

I knew a case

from the Internet.

After a granny

took her grandson

to the kindergarten in the morning,

she released the gas when she got home

and killed herself.

There weren't any signs

before that happened.

Her family members said

she was talking and smiling

when they saw her in the morning.

She was also spirited.

Aged patients suffering from depression

look even happier

than healthy people

on the surface.

However,

you can never know

when they will

lose hope for life.

It's difficult for us

to feel in the same way they do.

Didn't I

care about her enough?

I brought her here from the county

to see a doctor.

I know she

wants me to be with her every day.

But I'm so busy.

I'm busy with...

graduation.

I'm busy with postgraduate entrance exams

and things in the lab.

I also need to work

and make money.

I understand that

I did't care about her enough recently.

In fact, there is

another main factor.

Your grandma told me

that she has a heart disease.

She received an operation of metal heart valves

several years ago.

She even told you this?

If she is planted with mechanical valves,

she needs to take anticoagulant drugs

for the lifetime.

What's more, she will be troubled

by the sound every time

the metal valves close.

I guess this is

the main reason for her anxiety.

Actually, every time I lay my head

on her chest,

I can hear that sound

inside her chest.

I was wondering

whether she was able to sleep

if she heard that sound

every day?

But

there is nothing I can do.

She had to replace the valves.

There are currently

two types of materials for this.

Mechanical valves

and biovalves.

I understand your concern.

Biovalves

use animal-based materials

and can be used for 20 years at most.

Its life span is limited.

If they go wrong in 20 years,

she needs to receive another operation.

But by that time,

at your grandma's age,

she can barely receive

an operation again.

I know she is uncomfortable.

I'm uncomfortable, too.

But at least she's still alive, right?

In fact,

there is the third possibility.

You mean

tissue engineering heart valves?

Yes.

Let me put it this way.

Tissue engineering heart valves

are cultured

by your own cells.

They are alive.

They can grow,

and no anticoagulant drugs need to be taken.

Meanwhile, it's not easy for them to be retrogressed

or calcified.

They are the optimal valves.

It's like

they grow out of your own body.

I didn't know about this.

Now you do.

Scientists exist

for making miracles.

So,

this is how

you convinced my grandma

to participate in the clinical trial, right?

Strictly speaking,

I persuaded your grandma

to stay alive with this.

That's her hope of life.

And we haven't started

the clinical test yet.

It should be that

I told your grandma

I would ask Doctor Li

to have a physical examination for her

and then tell her about

tissue heart valves.

She might be too anxious

and has misunderstood it.

Then what stage

is this material?

I am not good at biology.

But Doctor Li will help us.

He now has found

ideal cells.

And we have mimicked

an ideal bioreactor

in the lab.

You know it.

So the thing is

the cell seeding.

Plant differentiated cells

on the macromolecule biodegradable stent

which is in the shape of heart valve

and cultivate it

to grow

a valve we need.

This is the most important issue

in our lab.

Thank you.

What trouble do you meet?

You can just tell me.

It's fine.

It's OK. Everything is fine.

It's fine.

During this lifetime,

I didn't feel guilty for anyone

except my daughter.

I could not sleep at night.

And I was always thinking of her.

When she was born,

her paternal grandma preferred boys to girls

and disliked her.

So she always wore a long face.

But I liked her.

Her eyes and brows were like mine.

I wanted her to live the best life.

Later, she grew up

and was marrying.

I tried my best

to find her the best man.

But I didn't expect to have harmed her.

I am so regretful.

If I had been more determined

and told her

'just go divorce.

It was no big deal.

I would support you anyway.',

she would not have been driven into a corner

and lost her life.

I owe her.

I was wrong.

I must take care of her daughter.

She can't follow the same old disastrous road.

I was too impulsive.

I can't die.

I have to live

for my granddaughter.

I have to endure it no matter how hard it is.

You needn't to worry too much.

Actually, she has never blamed you

and she didn't think

you cared about her too less.

At that time, she repeated that

busy as you were,

you still spared time to visit her

and accompany her to the hospital.

She felt sorry for being a burden to you.

She thought she had delayed you.

You should have

had a better life.

It's all her fault.

And she said

she felt deeply guilty

about your mom.

Don't touch me.

Apologize to Yang.

Okay. I apologize.

Apologize to Doctor Li.

Doctor Li, sorry.

I'll tell you.

I'm determined

to take part in this experiment.

No one can stop me.

Okay.

Why are you so anxious?

It hasn't started yet.

I should make an appointment earlier.

Okay.

Make an appointment.

What time is it?

I still have two operations this afternoon.

Come on, Granny Wu.

I'll take you to have a physical examination first.

Come on.

Let's go.

Examination. Examination.

Go.

This way. This way.

Don't worry too much.

Doctor Li has said

your grandma is not bad

physically.

Her psychological problem

is a matter of urgency instead.

I really didn't expect her

to have depression.

Most of people think

as you do.

It's said that

the old have seen and experienced a lot.

How could they be that fragile?

But the fact is almost the opposite of that.

They are actually the group

whose psychological health should be cared the most.

But don't worry.

I have applied to the nursing home.

They will get a psychologist

to treat your grandma with psychological counseling and intervention.

I believe

it won't happen.

Thank you.

You are more considerate

than me,

her granddaughter.

My honor.

Now,

which stage is the experiment?

We're still cracking the hard nut.

We're going to conduct

animal experiments.

But if it

doesn't succeed,

we might have to make some more adjustments.

Anyway, it needs some time.

Although your grandma is anxious about

taking part in clinical experiments,

it is not a small deal.

And you could use the time to

think it over.

I want to join the research team.

You are already a member of us,

aren't you?

I mean,

I want to officially join you.

This morning, when you sent me

that translation document,

I thought you were

going to quit.

To be honest,

I was thinking about quitting

during these days.

I was even going to give up the master's degree,

let alone the lab.

Then, what

changed your mind?

Because I must know

how the one that will be

put into my grandma's body

sooner or later

is made.

Then you still dared to send me

such a translation document.

Does...does that document

has anything to do with this program?

Yes.

But relax.

I have deleted it

only after one glance.

I won't allow it

in my program.

Even so,

I hope that you could realize

if the experimental subject

were not your grandma,

it would be someone else's family member.

We can't allow any mistake

or carelessness.

Solve seemly impossible problems,

rescue people on the verge of death

and lead human beings

to more advanced civilization.

It sounds

distant.

But to scientific researchers,

that is a mission we must reach

and significance of our existence as well.

So I hope

you could respect it

as long as you still work in the lab.

I don't have the say

about your admission to the lab.

Go ask Professor Jiang.

As long as he agrees,

it'll be okay.

Sorry.

I was wrong

about the document.

I won't anymore.

But I'd like to say

although I now

made this decision,

I don't think

my last decision was wrong.

Yes.

Make more money,

gain higher income

and have a better job.

There is nothing wrong with that.

But if everyone

thinks so,

there would be no progress of the world.

Young man, will you go?

Don't rush me. Wait a minute.

Minghao, thank you for your kindness.

I should keep my decision

to pursue a master's degree.

Would you like some drink?

I'm talking to you.

I put it there.

I almost finished my work.

I will

take the flight home the day after tomorrow.

We'd better not meet

for the time being.

Why don't you see him?

I'm too busy.

I have applied

for the admission to

Yang Lanhang's group.

I have to make up for the drop.

I wish I could

break one minute

into two.

I can scarcely spare my mouth to have meals now.

Think about it.

What if I can spare no time

to accompany him when he takes

a long flight home?

It's so important.

But I'm not in the optimum state at this moment.

Back to my first love,

I behaved like this, too.

Being swayed by gain or loss.

Smirk and weep within a minute.

I felt myself in the heaven.

And next second, in the hell.

It brings back so many memories.

So when

will you meet her?

She has declined the meeting.

Decline?

It will usually

happen between a couple

that has married

for five years.

But what stage are you at?

And it excited you so much

as you won't meet.

Is it okay?

I said I have ended the experiment

ahead of schedule

in order to meet her.

But she thought it irresponsible

and criticized me.

It...it is so interesting.

Anyway, dating

is interesting.

No. No. No.

It is her

who makes dating interesting.

Plant differentiated cells

on the macromolecule biodegradable stent

which is in the shape of valve

and cultivate it.

The stent is similar to

a three-dimensional space

that provides cells

a new zone

with ideal structures

and functions

for reactions of

cell-cell,

cell-matrix

and cell-cytokines.

It's just like that

vines need a stick to wrap around,

right?

Yes.

But ideally, we want

this stick to be biodegradable.

That is to say,

it can degrade

and be absorbed by the body

after completing its mission.

I see.

Kick down the ladder.

That is, retire after having made its mark.

Retire after having made its mark.

Zhang,

why did guru tell me

to think it over myself

and that he was busy

every time I consulted him?

Because he thinks you are clever enough.

And there's no need to teach you.

Really?

Did guru tell you that

I was clever?

The degradation behavior of materials

has something to do with

their physical and chemical properties.

Both quantity and distribution

of polymer polar molecule have an impact on that.

Are you okay?

Yes.

Thank you.

Let's go, Bai.

Let's go and have a meal.

No, I'm studying.

No study for now.

Come on. Eat something. Go.

You!

Microorganism ferments

and turns into high polymer material.

That is not feasible, right?

Materials produced from fermentation

is quite limited.

They can't meet

our experimental requirements at all.

Look here.

The note I took before.

Enzymatic synthesis?

During enzymatic synthesis,

there won't be

many by-products, actually.

And it only needs mild reaction conditions.

So it's usually used

to produce those that are hard to make

with conventional approaches.

For example, biodegradable macromolecular product

with optical activity.

There are not very much

about medical biodegradable

macromolecular products.

It's not hard to understand.

The thing is

that the material we want

not only needs to have biocompatibility,

upon which cells

grow tightly,

but also needs flexibility and mechanical strength

similar to natural valve.

Only then can it work well

before cells' growth

is completed.

Now the trickiest problem is that

the speed of its degradation

should match cells'

growth velocity.

If the degradation lags behind,

it'll have an impact on the growth of cells.

But if it degrade too fast,

the structure breaks before

the growth of cells is completed.

It worries guru a lot.

He?

Isn't he a genius?

So genius will feel worried, too.

Of course,

he's a man anyway.

But it doesn't matter.

With my assistance,

guru will soon solve that.

Alright.

No more question?

For now, yes.

Think twice.

You might forget some.

Are you sure you've solved all?

I haven't

got it through yet.

When I do,

I'll definitely turn to you.

Okay?

Okay.

Bai,

you know what to say

if guru asks you

why you make such a progress, right?

Because Zhai Qingyi is a good tutor.

Yes. Yes.

I heard that

Professor Jiang and guru

are going to attend

an international academic conference.

Three researchers will be admitted.

I'm counting on you

this time.

An international academic conference?

It's said that

Professor Leprince,

a famous expert in cell seeding, will attend, too.

Guru must go

for him.

Sounds so great.

I wish I could go.

Right?

It's a rare chance.

But you should just forget it.

I bet you can't get the place.

Guru.

Why are you two here?

Zhai Qingyi is voluntarily

tutoring me.

Yes. Yes.

This is my junior.

And this, too.

It's coincidental

that we met here.

Would you mind having a meal together?

Of course not.

Are you Li Feifei?

I...can I take a photo with you?

Okay.

Thank you. Thank you.

Thank you. Thank you.

Then I won't bother you.

Wish your new play good performance.

Thank you.

I thought you looked familiar.

Are you really Li Feifei?

Are you

guru's girlfriend?

Have a guess.