China coin ID help needed - Round coins w/ square holes

Hi All

Still digging through this box of foreign coins and have found a few treasures But these I have no idea how to identify!

Would love some feedback - thank you!!

 

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Here's a few good sites to help you identify Chinese cash coins:
http://www.calgarycoin.com/reference/china/china8.htm#chien lung
http://www.sportstune.com/chinese/coins/idpage.html

FYI, your alignments are all out of wack

 

Awesome guide! Found all 3! thank you!