I suggest you check the admission scores of Tsinghua University over the years and analyze them yourself. These data can be found on the Internet. You can also find a voluntary reporting system online. If you enter your own scores and other information, the institutions that can apply will automatically come out. Of course, for reference only.
I just made an inquiry for you, and found that it seems no problem to go to Tsinghua according to your present grades. If you keep working hard, you are sure to go to Tsinghua.
Generally speaking, the simulation questions are more difficult than the college entrance examination questions. You have made great achievements in the first mode, so the college entrance examination will be better than it is now if there is no accident. Come on!
I hope my answer is helpful to you. If there is anything you don't understand, just ask. I wish you an early admission to Tsinghua ~ ~