Simply put, the spot is an electronic warehouse receipt, which can be delivered in the medium and long term. Compared with futures, it is trading all the spot! The bigger transactions are the Yellow River Commodity Exchange, including cashmere, medlar, corn, cottonseed and Shanghai Commodity Agricultural Products Exchange. The varieties are Siraitia grosvenorii, Pu 'er tea, menthol, Tianjin Rare Metal Exchange, indium and magnesium! I hope I can help you!