China ID please

They are all from the Qing dynasty
The three first coins are from the 5th emperor Yongzheng (Chinese: 雍正) AD 1723-1735
The fourth one is from the 7th emperor Jiaqing (Chinese: 嘉慶) AD 1796-1820
The last one is from the 9th emperor Xianfeng (traditional Chinese: 咸豐) AD 1851-1861

Thank you very much!

all coins 23mm - fakes?

There are different diameters, but be sure your coins are genuine.
If you want to reach a precise identification, you'll have to invest some hours of your free time ... but we can help you .. and it's worth it.
Yet, most of collectors are enough with a light identification, an helicopter view.

At least you can begin with this Numista list and then find your coin in the Catalogue.
and this is where you realize that it's not over