Help with Chinese coins

Hello,
I could use some help with some of my Chinese coins. As a matter of fact, I am not even sure that they are all Chinese. I tried using the reference that FrenchLover has posted a couple of times, and was able to (at least, partially) identify about 9 of my coins, and another few are probably in such bad shape that I will never identify them, But I think that I have a chance of at least partial ids for these 5, even though a few of them are also in pretty bad shape. But some are just so different from the ones in the documentation so I am dying to figure them out. BTW, I could probably do better scans on any of them, if that would help.

I would appreciate any help. Thanks.
1.
2.
3.
4.
5.
6. (just some help for the reverse on this one)

First coin: 1 Mon - Nagasaki Trade Coinage
https://en.numista.com/catalogue/pieces43225.html

6 - DH# 22.1334 - Guang Xu - Canton (Guangzhou, Guangdong) - 1889-1890
Struck coin
This unorthodox reverse incurred Imperial disapproval, but was not immediatly discountinued



I've already seen this coin in the forum, but it doesn't seem already added in the database

FrenchLover, I do think that it is in the database. Would this be the one?: https://en.numista.com/catalogue/pieces17768.html

Thank you both for all of your help.

I'm afraid that I am still lost with coins 2, 3 and 5. Can I get a couple more clues? First of all, are they all Chinese? Number 5 in particular looks like it might be from Vietnam (Annam). I know that they are very unclear but I was hoping there might be enough clues in one or more of the characters on each such that someone who knows these coins well might recognize them.

-Daniel

coins 2, 3 and 5。。。。

2. Vietnam Empire - 1 Văn - Minh Mạng
https://en.numista.com/catalogue/pieces1068.html

3. Vietnam Empire - 1 Văn - Tự Đức
https://en.numista.com/catalogue/pieces50336.html

5. China Empire - 1 Cash - Yuanfeng （Seal script）
https://en.numista.com/catalogue/pieces34504.html

Wow! Thank you all so much. I looked each of them up in Hartil and (hopefully) I know a bit more for the next time. As I mentioned, I have 3 other coins which probably cannot be ID'ed at all, but perhaps I will try soaking one and see it it cleans up enough for me to make some sense out of it.