In my own words, what is the relationship between the fish upstream of the paper and the fish swimming in my heart? What idiom story does this have in common with?

1. The relationship between the fish upstream of the paper and the fish swimming in the heart is: if you think, you can jump out of the paper. If you want to paint a fish vividly, you must know what it looks like in your heart.

2, and "have answers" are similar. Have a plan, figuratively speaking, have skill and be sure. "Have a plan in mind" and "have a plan in mind" both mean "have a plan in mind". And "having an answer" focuses on having a comprehensive consideration and solution to the problem beforehand, or acting calmly because you have an idea in your heart; Knowing it "focuses on understanding the objective situation and is very sure."

3. A story with an answer:

Su Shi and Wen Tong, literati painters in Song Dynasty, were both good at painting bamboo. Su Shi is used to painting ink bamboo, thinking that painting bamboo must be done first. Wen Tong planted a lot of bamboos in front of his house and observed the growth and changes of bamboos every day, so the bamboos he painted were vivid and varied. Painter Chao praised Wen Tong's painting of bamboo "bamboo is in his chest"