Chinese coins 1700's-1900's [Risolto]

I have 6 Chinese coins (all round with a square hole) , based on the ones I was able to identify, I am fairly certain of the years of 1700-1900. 

Coin 1

Coin 2

Coin 3

Coin 4

Coin 5

Coin 6

thank you for any and all help

Let's go:

#1 Kangxi

N#31487 

#2 Qianlong

Reverse almost gone but probablyN#17924 

#3 Guangxu

N#30363 

#4 Qianlong again

N#17924  

#5 Guangxu again

N#30673 

#6 Daoguang

N#45072  (not completely sure about the reverse)

Thank you