A customer selects flowers at a floral wholesale market in Chicago, the United States, on Feb. 12, 2020. With Valentine's Day being one of their busiest weeks of the year, employees of floral wholesale markets in Chicago work hard to meet the demand of customers. (Photo by Joel Lerner/Xinhua)

 

Flowers are seen at a floral wholesale market in Chicago, the United States, on Feb. 12, 2020. With Valentine's Day being one of their busiest weeks of the year, employees of floral wholesale markets in Chicago work hard to meet the demand of customers. (Photo by Joel Lerner/Xinhua)

An employee prepares flowers for Valentine's Day at a floral wholesale market in Chicago, the United States, on Feb. 12, 2020. With Valentine's Day being one of their busiest weeks of the year, employees of floral wholesale markets in Chicago work hard to meet the demand of customers. (Photo by Joel Lerner/Xinhua)

An employee prepares flowers for Valentine's Day at a floral wholesale market in Chicago, the United States, on Feb. 12, 2020. With Valentine's Day being one of their busiest weeks of the year, employees of floral wholesale markets in Chicago work hard to meet the demand of customers. (Photo by Joel Lerner/Xinhua)