What's the problem of giving seats to pregnant women in Kenny Lin's new guidebook?

In the ninth issue of New Travels, Kenny Lin and Yun-peng Yue play the pregnant woman and the old man on the bus, Kenny Lin plays the pregnant woman and Yun-peng Yue plays the old man. On the bus, Kenny Lin can't give her seat to the old man played by Yun-peng Yue because she plays a pregnant woman.

At this point, Bo Huang and Wang Xun happened to be nearby and saw this scene. Bo Huang and Wang Xun offered to help Kenny Lin stand up and asked Kenny Lin to give his seat to the old man. This scene is very warm and reflects the kindness and helpfulness of Bo Huang and Wang Xun.