The only dim sum she ever made was siu mai: small, open-topped dumplings filled with pork and shrimp. These were far easier than other types of dim sum because you could buy the wrappers ...

Jasmine Wong Yin-yee, a beauty consultant, said she used the reviews to help find her favourite street food every weekend. "Siu mai may all look similar, but honestly, you can taste the difference ...

Hongkonger Andrew Wong Tsz-san is more passionate than most about Cantonese dim sum staple siu mai, a dish that inspired him to create an online group to gather fans of the street food favourite.