500ml wine: 225ml of alcohol and 275ml of water, which are fully mixed to form this bottle of wine. In fact, there is no explicit provision, but a habit formed over time. 500ml is a big integer, which is the custom of China people.
Extended data:
China liquor is a compound flavor with esters as the main body, koji and distiller's yeast as saccharifying and fermenting agents, and starch (sugar) as raw materials, which are cooked, saccharified, fermented, distilled, aged and blended.
Liquor is mainly concentrated in the triangle of Renhuai in Guizhou, Yibin in Sichuan and Luzhou in Sichuan in the upper reaches of the Yangtze River and Chishui River basin. It has the largest and best quality distilled liquor producing areas in the world, namely, Maowulu, the three famous wines in China. Its liquor industry cluster shoulders half of China liquor industry.
References:
Baidu encyclopedia-Chinese spirit