China Grain and Oil Business Network, Alibaba, Huinong.com, etc.

1. China Grain and Oil Business Network: Provides price trends and futures and spot market information for various agricultural products. It is a large-scale professional grain, oil and feed business consulting service website in China.

2. Alibaba: There are many wholesalers of grain and oil, and you can find primary sources of goods through this platform.

3. Huinong.com: It has rich supply information of grain, oil, rice and noodles, and you can directly connect with factories or traders through this platform.