Chinese coins ID

Appreciate any help to identify these coins. How can I know if they are fakes?

Hello,
Happy to help as always; for Chinese cash coins there's a certain "look" to fakes, either they're unnaturally good and straight or unnaturally bad and deformed (with regard to the characters). None of your coins look this way, so good news on that!

Top left; 1 Cash Kangxi (Yuan):
https://en.numista.com/catalogue/pieces36369.html
(You should consider uploading your pictures to replace the one in the catalogue here, where the defining character is so worn that it's hardly helpful.)

Top right: 1 Cash Jiaqing (Boo-yuun):
https://en.numista.com/catalogue/pieces19759.html

Middle left: 1 Cash Kangxi (Kwang):
https://en.numista.com/catalogue/pieces19747.html

Middle centre: 1 Cash Qianlong (Boo-yuun):
https://en.numista.com/catalogue/pieces17924.html
(Your exact variant is probably DH#22.347 or 348, with the long V on "yun".)

Middle right: 1 Cash Qianlong (Boo-chiowan):
https://en.numista.com/catalogue/pieces1133.html
(Unsure of mint)

Lower left: 1 Cash Qianlong (Boo-chiowan):
https://en.numista.com/catalogue/pieces1133.html

Lower right: 1 Cash Daoguang (Boo-chiowan):
https://en.numista.com/catalogue/pieces26024.html

Great! Many thanks.

Quote: "FelixEshed"​Great! Many thanks.

​The pleasure is all mine.