excuse me
I have one more question.
https://mixcg-1256075144.cos.ap-guangzhou.myqcloud.com/question2.jpg
I ask questions by category.but
https://mixcg-1256075144.cos.ap-guangzhou.myqcloud.com/question1.jpg
there’s only one category，no parent。It should be “疑难杂症”“模型”
sorry,my english is bad.
