So many negative reviews about the story line. The thing is you won't know what you will or won't do for love until you're in their shoes.

Yi Cheng wouldn't accept any female programmers working for him because his first love supposedly betray him by selling his work to their competitor and ran away with the money. It may not make sense for you that someone could do that, or call him close minded. But everyone reacts differently to each trauma they face. I think he was just protecting himself from any chance of the same repeating heart break. Him getting into a car crash because of what she did show how devastating it was for him. So I'd give him a break for that.
The fact that he fell for Lu Li even when she was pretending to be a man to get the job, all the little things he did for her in the background, and not wanting to admit his feeling for her. That's what bothered me the most. Why wait until she leaves you and turn around chasing her, when it can be solved with good communication.

As far as Lu Li goes, call her door mat or whatever. But I don't think that's the right word for her. How many of us has fallen for someone so hard for so long that when opportunity presents itself, where you can finally be with that person, you just grabbed the bull by the horn and along for the ride, no matter how it bucks you and finally thrown you off. You can't tell me how far you'd go or how much you'd do to win the love of the person you love. And that's exactly what she did. She finally gave up on him was not because Li Man keeps throwing one jab after another, but because Yi Cheng is unwilling to communicate with her of the reason why he did what he did, causing misunderstanding between them. Like on their last fight before she left, instead of telling her the reason she can't leave is because he loves her, and yet he told her that they haven't reach the end of the contract yet. Yi Ming was so right when he told Yi Cheng he has low EQ.
Yeah Zi Tong maybe annoying to some people, but somehow I think it's cute. Just look how Yi Ming finally fell for her.
The only characters I'm not too happy about are Yi Cheng's parents. His mom is so desperate to get him settled down that she would set him up with blind dates, even when she found out that Lu Li has left him. Really? And his dad would use anything in his power to make his wife happy even if it means that his son would marry someone he doesn't love. What kind of parents are they?
I found my self rewatching certain episodes 3-4 times. I honestly think it's funny every time Yi Cheng gets drunk, especially the second time at his parents house.