First of all, thank you very much for taking the time to answer my question.In the part you have answered, we all think the same, and the answer should be the same,too.@Mr.CHEN
I will show a possible reaction mechanism that I personally wrote to you, and I remembered it at three in the morning.
(Sorry, I took the photo at night because I only have time at night.If the photo is not clear, please let me repost.)