On November 27, 2020, the Calgary Pandas Er Shun and Da Mao were sent back early to China. The Covid-19 pandemic made it difficult for the Calgary Zoo to obtain sufficient supplies of Bamboo to feed the pandas. Below is a picture of the cover front and back. The original CALTAPEX cover from 2019 was used with an overprint done on the front and back, and the covers cancelled 27 November on the back.