What was the Tibetan unit in the old society?

In the past, in Tibet, grams were the unit of measurement, and there were three situations:

First, like fighting in the mainland. However, the size varies from more than 20 batches (like those in the mainland) to more than 30 batches, ranging from one gram. At the end of the Qing Dynasty, Sichuan changed soil into fluid, and unified it into 30 kilograms of Kuping as a gram of measurement.

Second, the unit of weight in Tibetan areas is about six or seven kilograms per gram.

3. Units of calculation of cultivated land area in Tibetan areas. That is, the area of planting one gram of seeds is called one gram of land, which is about one acre.