Street snacks are part of Hong Kong's food culture. Fish eggs, eggs, rice rolls, bowl wings, cakes with different edges, plaid cakes, paparazzi powder, bean jelly, pork red, beef offal, Saqima, asparagus, crispy dough twists, egg rolls and fried three treasures are all very popular street snacks. Most street snacks come from Guangdong, but a few come from other provinces. For example, Saqima is a Manchu snack. Other salty and sweet snacks in Hong Kong are also full of traditional flavor, and some are unique to Hong Kong, such as the old lady's cake and husband's cake in Yuen Long. Hakka teacups are more popular in outlying islands.

Chezaimian appeared in the 1950 s, when mainland refugees flooded into Hong Kong and it was difficult to make a living, so mobile vendors appeared. In order to facilitate transportation, mobile vendors put all kitchen utensils and food on small wooden trolleys, hence the name Chezaimian. Because customers can choose noodles, ingredients and soup at will, and the price is affordable, they are welcomed by the public.

This situation is most common in Yau Tsim Mong.