On Tuesday, about 100 couriers from 11 delivery companies gathered for a ceremony at a transport hub in Beijing. [Photo by Luo Wangshu/chinadaily.com.cn]

Singles Day is China's largest online shopping spree. It is also considered by delivery service companies the biggest and busiest day of the year. [Photo by Luo Wangshu/chinadaily.com.cn]

Singles Day is China's largest online shopping spree. It is also considered by delivery service companies the biggest and busiest day of the year. [Photo by Luo Wangshu/chinadaily.com.cn]

Singles Day is China's largest online shopping spree. It is also considered by delivery service companies the biggest and busiest day of the year. [Photo by Luo Wangshu/chinadaily.com.cn]