Why does Hou Mengsha always appear in military TV series?

Speaking of actor Hou Mengsha, the name is a little strange to most audiences. But she is not an ordinary woman. She graduated from Nanjing University with a master's degree in art, which is rare in the entertainment industry. But why did the audience have no specific impression or even know nothing about such high flyers? This is because after graduation, she began to act in TV series, but she chose a theme about the military field wholeheartedly, and she acted in all serious plays. She didn't appear in more popular and wider idol dramas, and so on. I have to say that her choice of stage is very admirable. After all, what most people in the entertainment circle want is to get more attention.