Who was the inventor in ancient China?

In the long river of history, the contributions made by those ancestors to future generations are indelible, and people will not forget them after thousands of years. Here are some inventors who had a great influence on China. Cai Lun invented paper, which brought convenience to our life. He put down the wide bamboo slips and picked up the thin paper. Hua tuo invented anesthetic powder, which made us face painful wounds, not pain. Du Kang invented wine to make life more poetic. Bi Sheng improved movable type printing and made fonts come alive. No, it's the dead word. Shen Kuo invented the compass to help the lost people find their way home. They are great, and their achievements shine in the history books and are immortal. Because of them, we have a happy life and are grateful to our ancestors.