China's crude oil futures contracts have a trading period, and the last trading day is the last trading day before the delivery month 1 month. Shanghai International Energy Trading Center has the right to adjust the last trading day according to national statutory holidays; If the last trading day is adjusted, it will affect the time nodes of new contract listing, natural person withdrawal, hedging arbitrage business, futures cash transfer and other businesses. Among them, the cut-off point for natural person to extract crude oil is before the close of the eighth trading day before the last trading day.