I. Various Supply (Wholesale) Websites
Go to some B2B and B2C platforms to check the source of goods. For example, Alibaba, HC and so on. Baidu search has many such information sources.
Second, go to some small commodity wholesale markets.
For example, Yiwu Commodity City in various places, or directly purchase from commodity manufacturers. That is, from the entity's wholesale market or manufacturer.
The larger wholesale markets in China are:
Zhengzhou Textile World, Henan Province 1
2. Ai Wu market in Shenyang, Liaoning.
3. Changde Bridge South Market, Hunan Province
4. South Santiao Fair Wholesale Market in Shijiazhuang, Hebei Province
5. Chongqing Chaotianmen Wholesale Market