In China, 5 106 10 Huaxia energy ETF index fund is known as linked to crude oil. However, judging from its positions, it is not highly correlated with crude oil, but actually related to the Shanghai Stock Exchange energy industry index.
Of course, if you really want to buy crude oil in China, Industrial and Commercial Online Banking has paper crude oil. Account commodities, including North American crude oil and international crude oil targets, can be purchased in US dollars or RMB.
As for making crude oil through intermediaries, it is not impossible. It's just that domestic middlemen play the game of eating and eating again, and the essence is liar+leather bag company. Foreign agents are also acceptable, but even the market value of FXCM is only 10%. It's capricious of you to gamble all your wealth in this way.
Having said that, there are actually many ways to make crude oil, and there is always one that suits you.