Photo taken on Jan. 30 shows customers lining up to buy qingtuan, or sweet green rice balls, at a store on Fengmen Hengjie, a historical street in Gusu District, Suzhou City. The traditional food is made of sticky rice and mugwort juice that gives the snack its distinctive green hue. (CFP Photo)

The traditional food qingtuan, or sweet green rice ball, goes on sale at a store on Fengmen Hengjie, a historical street in Gusu District, Suzhou City, January 30, 2023. The traditional food is made of sticky rice and mugwort juice that gives the snack its distinctive green hue. (CFP Photo)

Photo taken on Jan. 30 shows customers lining up to buy qingtuan, or sweet green rice balls, at a store on Fengmen Hengjie, a historical street in Gusu District, Suzhou City. The traditional food is made of sticky rice and mugwort juice that gives the snack its distinctive green hue. (CFP Photo)

Photo taken on Jan. 30 shows customers lining up to buy qingtuan, or sweet green rice balls, at a store on Fengmen Hengjie, a historical street in Gusu District, Suzhou City. The traditional food is made of sticky rice and mugwort juice that gives the snack its distinctive green hue. (CFP Photo)