亚洲av综合久久伊人,国产日韩久久免费影院,中日韩激情白浆一区二区三区,AV片在线观看

(Photo/People.cn)

2.Daily necessities

In this category, personal hygiene products are the most profitable items. For instance, the most expensive ingredient in the toothpaste is the foaming agent, which only costs 600 yuan per ton (2,205lb) or less, and 600-yuan worth of foaming agent can fill full 6,000 toothpaste tubes of the maximum size available in the market.