Who is the hero with the answer?

Painters in the Northern Song Dynasty have the same language, word and ability.

The bamboo he painted is well known, and many people come to paint it every day. Where is the secret of Wen Tong's painting bamboo? It turned out that Wentong planted all kinds of bamboos in front of and behind his house. No matter spring, summer, autumn and winter, it is cloudy and rainy. He often goes to the bamboo forest to observe the growth and changes of bamboo, and figure out the length and thickness of bamboo branches and the shape and color of leaves. As soon as he has new feelings, he returns to his study, spreads paper and grinds ink, and draws his impressions on paper. Over the years, the images of bamboo in different seasons, different weather and different times have been deeply imprinted in his mind. As long as you concentrate on writing and stand in front of drawing paper, the various forms of bamboo observed on weekdays will immediately emerge in front of your eyes. So every time he draws bamboo, he looks very calm and confident, and the bamboo he draws is vivid and lifelike. When people praised his paintings, he always said modestly, "I just painted the mature bamboo in my heart." There was a young man who wanted to learn to draw bamboo. He heard that the poet Chao was very good at Wentong's paintings, so he asked for advice. Huang wrote a poem for him, including two sentences: "You can use it to draw bamboo, and you have answers."

The story comes from Su Shi's Notes on Yu Wenke yún dāng Gu Yan in the Northern Song Dynasty. "Have a plan" means that you are fully prepared before doing things and are very sure of the success of things; Metaphor is unhurried and very calm.