3ds max import model problem

I made a model by 3ds max. After that I want to import it to unity but here have some problems happened.
In unity some parts of the model are shifted. The following is an example.
https://media.discordapp.net/attachments/867396579728162841/923066976853712957/unknown.png

There is the normal look in 3ds max.
https://media.discordapp.net/attachments/867396579728162841/923037179150737438/unknown.png

There is my step in 3ds max to export a FBX file.
1. https://media.discordapp.net/attachments/867396579728162841/923060344237211688/unknown.png
2. https://media.discordapp.net/attachments/867396579728162841/923060344757297192/unknown.png

After that Warnings and Errors will shown.
https://media.discordapp.net/attach...345172541460/unknown.png?width=744&height=718

What should I do to fix this problem?
Please Help! Thank you!