Hold a book, sit in a chair, sit in a third of the chair, and put a book on your knees with your legs together. Stick to it for 20 minutes at first and add 5 minutes every day. Later, the thickness of the book can be reduced.
What's more, it's good to stick it on it.
Skinny legs have an effect
This is for external use.
Suitable for teenagers
You can go to Taobao to have a look
They want to be good housekeepers.