Li Xinyan's birthday, Su Yi only found out by chance.

After all, Li Xinyan sometimes doesn't even remember her birthday, just like today, if he hadn't given her a birthday, she would have forgotten that today was her birthday.

For a person who can't even remember her birthday, how can she talk about her birthday, she doesn't pay attention to her birthday, and naturally she won't let others care about her birthday, and it is very rare to want her to take the initiative to say her birthday.

Therefore, Su Yi did know about Li Xinyan's birthday by a very chance, and then prepared a birthday party for her.

Li Xinyan doesn't pay attention to her birthday, but it doesn't mean that he doesn't pay attention to it either.

Su Yi doesn't know if Li Xinyan has a family, but since he lives with him, he will treat her as his best friend, treat her as a family member, and make her a member of the family.

Therefore, regarding Li Xinyan's birthday, he will never pretend not to know, and let this day pass quietly.

Because of this, after Su Yi knew Li Xinyan's birthday, he began to prepare and did a lot of things, all for this day, just to let her live the most memorable day, let her know that he is her family, let her experience the taste of being cared for, and let her know the warmth of home.

His purpose is really simple, he just wants her to be happy, he has no other ideas, it is a pure purpose, and he will not mix it with other things that he doesn't have.

As for why Su Yi chose a custom piano as a gift for Li Xinyan, why he thought she would like the piano, and how did he know that she could play the piano, this was not discovered by him, but through observation and then analyzed by himself.

It can be said that he and Li Xinyan get along day and night, live under the same roof, see each other every day, and are very good friends with each other, as long as they are a little careful, even if the other party doesn't say it, they will know a lot of things about each other.

For example, Su Yi's living habits and what he likes to do, Li Xinyan will know it very well, even more clearly than himself.

After all, there are some details of life that he himself has not noticed, and even if he does, he will not notice it, but as one of the closest people around him, she can find these details, and it is not an exaggeration to say that she knows herself better than him.

In this way, it is not surprising that Su Yi knows that Li Xinyan will like the piano and can play the piano.

In fact, before this, he had never seen Li Xinyan play the piano, today's piano music is the first time he has seen her play the piano, and he has never seen her play the piano before, but he can also find that she likes the piano, mainly because he is more careful, or he is more attentive to her affairs, so he will find out this.

A long time ago, Su Yi knew that Li Xinyan knew music very well, and she knew more about music than ordinary people, and even thought that she knew more than the top students in this field, and her attainments were even deeper.

Not for anything else, just because every time he listened to the violin of Anola, as long as Li Xinyan was by his side, then he wanted to know everything about music, and she would explain it to him in great detail.

Even just by hearing the prelude, Li Xinyan can know what kind of violin music it is, and she can also tell the composer, even in what year, including the artistic conception of this piece and the original intention of creation, she can tell it all.

And Su Yi can only hear whether it is good or not, but Li Xinyan knows everything about the tune, which is not something that ordinary people can do, only if they know enough about music, they can know so much.

Of course, if he only knew this, it would naturally be impossible to think that Li Xinyan would like the piano, and he naturally had other discoveries.

Su Yi found that Li Xinyan was not so interested in cosmetics and clothes, and she didn't have many other hobbies, but Su Yi found that every time she went out, every time she happened to pass by a musical instrument store, her eyes would be on the musical instrument store, looking at various musical instruments, and the most she saw was the piano.

So, he knew that she not only liked music, but also loved musical instruments, and her favorite thing was the piano.

If Li Xinyan didn't like the piano, then her eyes would not have stayed on the piano for so long, and she would not reveal her reluctance.

It is also very normal for a person who knows a lot about music and is so interested in musical instruments, who has studied music and knows at least one instrument, and it is also very normal to be able to play the piano.

Su Yi didn't know about Li Xinyan's past, but she always thought that she should have lived in a wealthy family before, and it was not strange that she had received a higher education and studied piano.

Therefore, he thinks that Li Xinyan likes the piano and can also play the piano.

Even if Su Yi had never seen her play the piano, he was still very firm in his opinion and believed that he was not wrong.

After he found out this, he thought about buying a piano for her, so that she could play music again and start her hobby again, instead of suppressing what she liked, so that life would be more interesting.

It's just that the piano that Su Yi wants to give away is not an ordinary piano, and he feels that if an ordinary piano is sent out, it will be meaningless.

Therefore, he wanted to customize a perfect piano that could achieve the perfect piano in his mind.

And it just so happened that Su Yi knew Li Xinyan's birthday again, so he wanted to give her such a piano on her birthday to bring her the biggest surprise.

That's why he customizes the piano and participates in the whole production process, just to let her experience the biggest surprise on her birthday, a surprise without any flaws, and now, it proves that he is not wrong.

Li Xinyan does like the piano, and she does know how to play the piano, but when she sits in front of this piano, the love she shows is definitely not acted, but her true feelings are revealed.

When Li Xinyan smiled for this piano, the moment her smile appeared, Su Yi felt that the meaning of this piano had increased a hundredfold and a thousand times.

He did so many things just to surprise her and make her experience real happiness.

Now, Su Yi has done this, and he will naturally be very happy, and if he can make her happy, it will be enough to make him content, and he will be happy for her happiness.

Sometimes, happiness is a very complicated thing, but it can also become a very simple thing, depending on the mood in which you do it, and it will have very different results.