They are based on Emperor Xianfeng coinage. Here's an example of an actual Xianfung Yuanbao 1000 cash. But these all look like modern replicas to me. If they don't show normal wear, patina or signs of being made by casting, best bet is to assume that they are not authentic. Only very late Qing Dynasty coins would be struck rather than cast.
I'm a relative newcomer, (coming up on 2 years soon), but my advice would be: 1) Post in the appropriate forum (world coins instead of ancients for most of these) 2) Try not to put each item from a similar set as its own topic. That tends to push other people's new posts off the first page before people get to see them. Other than that, most people are happy to help. I actively enjoy learning to ID cast Chinese/Japanese/Korean/Vietnamese coins, and have been working through my own collection in my own thread. I've been posting to it every day or two for almost a month and no one's toes seem to have been stepped on yet. Still a ways to go before I'm done...
