The theme song in "The Guest from Thailand" uses the erhu, a work by Gao Shaoqing, which has introduced many foreigners to the Chinese musical instrument erhu, but this is a TV series, not a movie

But from his profile, we can tell that he has also composed music for other movies, but I have not seen them:

Gao Shaoqing's composition talent is reflected in his beautiful and moving melodies. His works are rich in emotion, rich in charm, refined and elegant, fresh and chic. The compositions and songs he composed include "Strange Bird", "Yin", "Jiggle", "Heaven and Earth", etc., and the film music includes "Yellow Wedding" and "Chinese Chocolate".

"Earth: Final Conflict" (E: FC) music performer - Gao Shaoqing's personal introduction

Gao Shaoqing is an erhu player and composer who is popular in the world music scene today Home. His musical talent is not only fully reflected in his erhu playing, but also in his music creation, which is full of inspiration and life.

In addition to his own series of erhu albums, Gao Shaoqing's erhu performances have been included in many Chinese and foreign films, television, radio, advertising and other media. Recently, the theme music he performed for the American science fiction TV series "Earth: Final Conflict" and "The Guest" was nominated for the "EMMY" Award and won the Canadian "Gemini" Award. Thousands of viewers who watched "Thai Star Visitor" became obsessed with his erhu, and also learned about this musical instrument that originated in China.