Orchid repotting: I cut off the old roots and told my son to throw them away, but he came back with a 20-yuan surprise

I cut off the old roots while repotting my orchid and told my son to throw them away, but he came back holding 20 yuan. My son said, "There's a surprise."
Recently, I noticed new changes in the potting medium of the two orchids I care for. Looking closely, several new shoots had sprouted next to the orchid roots, which delighted me greatly. Looking at the orchid plants again, they had not been repotted for several years. Although they looked fairly lush, I decided to divide them so as not to affect the healthy growth of the new shoots.
I went to the orchid market and bought two rather nice purple clay pots, so that my orchids could show what they could do and grow quickly in their new environment. So I chose to do it yesterday, because the weather was also quite good, neither cold nor hot - you could say it was an auspicious day. I also asked my 8-year-old son to be my helper, to carry a few tools for me and such, and casually let him take a look and get some exercise.
So I carefully dug the soil out of the original orchid pot. The moment I tipped the orchid out, I had mixed feelings: what made me happy was that seven or eight new shoots had grown on the orchid roots; what worried me was that some orchid roots had already shriveled, and one side even showed signs of hollow roots. Luckily I found it in time, otherwise the whole pot of orchids might have been ruined. For this reason, I picked out all the old roots that I felt had no potential for development, then disinfected the orchid and potted it up.
To keep the little rascal from making trouble, I told him to throw the trimmings into the trash can by the road and not toss them around everywhere. He loves playing in mud, and he got mud all over himself. Holding the orchid roots and mud in both hands, he ran outside. A little while later, my son came back holding 20 yuan and shouted, "Dad, there's an unexpected harvest today." I thought he had picked up 20 yuan on the road, but after asking I learned that it was given by Mr. Zhang from the Longyun Yayuan residential community next door. He happened to pass by while taking a walk and saw my son about to throw the old orchid pseudobulbs into the trash can, so he immediately called him to stop. To encourage the child, he took out 20 yuan as an exchange and took the old orchid pseudobulbs home himself.
It turns out that Mr. Zhang is an expert at growing orchids. His balcony is full of potted orchids, and he is also very knowledgeable about orchid care. He often takes his orchids to exhibitions. This time, if I run into orchid-growing problems, I can go to him. But as for this 20 yuan, I still do not know how to return it.