The primary conflict in this paragraph is external: Meimei vs. Lau Po.
In this paragraph Meimei is excited to see a congregation of people sharing their love for chess, so she runs home to get a chess set to join and practice with them as well. The conflict in this scene happens when the man, who will soon be introduced as Lau Po, makes an assumption based on Meimei's gender. He surmises that because Meimei is a girl, she must be in the park to play with dolls, and this causes Meimei to be offended as she wants to be seen as a serious chess player.