Pu-erh tea shapes

„Pu-erh shape - Bing, Beeng, Cake, or Disc - A round, flat, disc or puck-shaped tea, the size ranges from as small as 100g to as large as 5 kg or more, with 357g, 400g, and 500g being the most common. Depending on the pressing method, the edge of the disk can be rounded or perpendicular. It is also commonly known as Qīzí bǐngchá (七子餅茶, literally "seven units cake tea") because seven of the bing are packaged together at a time for sale or transport.“

„tong; 筒 - Literally a barrel or barrel shaped object. A tong in Yunnan tea culture is a bundle of 7 tea cakes wrapped in the outer skin of bamboo which naturally sheds from around the base of the bamboo stem. Each cake weighs 357grams so making a total of 2,499 gm. Said by some to have been calculated in order to remain under a specific legislated weight of 2.5 kg. There were originally said to be 8 cakes in a tong. The 8th being paid as a levy. An earlier unit of weight in China was the liang. A cake of tea weighed 7 liang and 7 cakes in a tong made 49 liang. “