How can I play contracts and not lose money?

This trick is applicable to everyone

I haven't lost money playing contracts anyway

I calculated that this time Liu Qiangdong lost 10k, Jack Ma lost 25k, Wang Xing lost 30k, Zhou Hongyi should have lost 100k, iQIYI lost 18k, Meituan lost 30k, Li Yanhong lost 80k, Xiaoying Kuai Dai lost 8k, 58 Kuai Jie lost 18k, Bank of China Financial lost 30k

Why should I pay back what I got from credit reporting, and who else can lose?