On June 14, the Dragon Boat Festival, China Post officially issued a postcard based on the renowned painter Liu Zhong's traditional Chinese painting Bullish. On the same day, the Bullish postcard was launched during a public welfare donation ceremony.

2021 is the year of the ox in the lunar calendar. The ox featured in the work Bullish symbolizes diligence and loyalty, and the panda is loved by people all over the world for its gentle and honest image. On May 18 this year, the painting was launched into space by a rocket. The artist made the ox and the panda join hands and also combined these national treasures with outer space, expressing the artist’s wish to communicate with the world through culture.