No, it is normal to celebrate birthdays, but as a friend, you do not have to bless them publicly, you can also bless them privately. It’s not that he’s not popular.

Although August 29th is Lei Jiayin’s birthday, and fans have sent him birthday wishes, few celebrities in the entertainment industry have publicly celebrated his birthday. Only Rey Yi commented on his birthday on Weibo. A celebrity in the industry sent him birthday wishes, but no other celebrities in the industry publicly celebrated his birthday on Weibo. In the TV series "The Twelve Hours of Chang'an" Reyza and Lei Jiayin are the on-screen co-stars. She said that Lei Jiayin is a very funny person and his words are very funny. We are waiting for him to speak every time. I feel that Jiayin makes people very comfortable. He is a man who is very dedicated to his work. We all like him very much. He was very tired during the filming, but he was always adjusting the atmosphere.

In daily life, Lei Jiayin is humorous and does not have much celebrity baggage, such as the well-known Lei Jiayin and Liu Haoran, as well as the big head that is often ridiculed. Regarding these, Lei Jiayin He doesn't mind at all and often makes fun of himself. This kind of Lei Jiayin is approachable and tolerant, and it is very comfortable to get along with him. Therefore, Lei Jiayin has gained good popularity in the circle.

So this doesn’t explain anything. It’s better not to make random guesses and pay close attention to their works.