Lei Junfeng never expected that he would fall in love with such a strange and silly girl as Du Leilei. He can still lie to himself when he doesn't realize how he feels about her.
But now he knows how he feels and doesn't want to lie to himself anymore. He was never one to listen to other people's advice or give up things he wanted without a fight.
Since she wanted to leave, he wouldn't stop her. However, he will make sure that she never forgets him. And to do this, he needs to show his presence in front of her anytime and anywhere.
It was impossible to follow her around like a clingy dog. He still has the dignity of a man. Then, there is only one option left.
Becoming such a successful man that his pictures can be seen everywhere. This way, even if he can't be with her, she can see him. As for losing contact, he would never let that happen.