I found this card amusing cos these guys seem to be having so much fun drinking this way!
Gelao people are one of the 56 ethnic groups in China, mainly located in the western part of the Guizhou province (south China) and numbering just under half a million. They practice Taoism and to some extent Buddhism.
The tradition is called Za Jiu / Pipe drinking. The pipes can be made of different materials such as bamboo, rattan or reed, and are used for drawing wine from the container. Not easy to find out more, but i am intrigued! Thank you StanleyPao for this interesting card :)