1914 & 1928 China / Shanghai Yuan

What works against the present day value of these is the sheer quantity printed. But they're worth enough in crisp & uncirculated condition to properly store and preserve them.

Here's a worthwhile website for identification & information:

https://www.banknotes.com/cn.htm

There's a linked store page there that'll give you full retail pricing.

The actual value of any collectible is the price you pay for it, and then the price you sell it for.

Do go on ebay, and determine a range of values for each of your notes. You do have 'something nice-ish', quantity can be good.

If you want to sell, get a good photo of each note, both sides. It's best to sell each note separately, although sequential serial numbers should be paired and sold as a pair. Don't sell runs of ten numbers, or similar, break them down into pairs, with maybe a three-some to get the last one in. Sequences larger than three just attract lower prices.

Get some mylar holders to mail them in, and some hard mailers. Add the cost to the postage and round it to a dollar. Don't plan on making money on postage. Fixed price postage is best, and combine postage. Do look at a rate of say, $8.00 to Europe, $5.00 for Canada, and Registered Post everywhere else. I use $3.00 for the US, which includes the postage, most of the hard mailer, and the mylar holder sent to me yesterday by some other vendor.

Take your ebay values, average 'em up, and either start your auction low, or Buy It Now for something below the average. These are common enough that no one will pay a lot for these, and AU-UNC condition rules.