Look at the website of Shanghai Stock Exchange. After all, the data it trades should be available, but it's hard to say whether it has been updated in time or whether it has been completely saved. If there is, it is only the daily transaction data, the lowest and highest opening and closing prices and other information /delta. Forget it. There can't be. Can't be so complete and advanced. Even those who specialize in data collection can't do this. This is my general advice. I must consider the remaining methods. Just don't be cheated.