Emily’s father wins a Singapore Tennis Championship. There’s honestly not a lot out there about the play that gives away the plot, so there isn’t a lot to say about the plot itself. However, it is set in Singapore. The time period is the 1960s, and it is still under copyright, so this answer has been written so as to not violate that copyright. “Emily of Emerald Hill” is a play, not a novel. She is a hardworking Chinese girl, and she marries a richer Chinese man.
The play explores the work ethics of the Chinese immigrants of the day, and how many Chinese immigrants became wealthy outside of China. There are no indications that it also details how the Chinese Communist Party (the CCP) feels about Chinese immigrants becoming wealthy outside of China. (For those unfamiliar with the CCP, they think that overseas Chinese belong to China.)