As Hua Old Man said, a single chopstick is easy to break, but a bundle of chopsticks held together is hard to break easily.
The same principle applies to twisting multiple strands of tendon into a single thread.
Jin'er admired her grandfather and father. The space had no internet to search for the method, so she relied on memories of what she had seen before and insights from books. However, she truly did not know what to do next.
Indeed, the wisdom of the working people is not to be underestimated. Her grandfather and father, with their accumulated experience, figured out what steps to take next by themselves.
Tying so many tendon threads into one looks easy, but is quite challenging in practice. In any case, Jin'er tried several times without success. The tendon threads seemed to have their own minds, always twisting in their own ways instead of according to her wishes.
