This might also indicate a large degree of variation between different units; this is not unheard of , especially among new companies.
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I do not know, and it is your money so it easy for me to spend, but,
I think it would be advisable to spend a little more and get a great company like Rogue behind you if buying new or buy used audio research, cj, bat, vac, quicksilver, get a nice component and all are great companies that stand behind their stuff.
i recently bought a yaqin for the same reason as the op states--to try tubes for cheap. as others have posted, build quality ain't great; however, it sounded surprisingly good--it made me want to buy better-built, snazzier tube gear. now, i enjoy the journey, so i'm not sorry i bought the yaqin, but if you're more into the destination, you would be better served to buy a more upmarket piece.
Good versus what other tube amps? What sound are you looking for? Reviews are for suckers! You want good amp suggestions - Lafayette KT-550, Music Reference RM-200, Counterpoint amps (many upgrades available), ARC D-150, Quciksilver M-190s, etc. These are very good designed amps that offer excellent sound for the money and probably better then most other amps made today.
M&C, What is your budget? I am not familiar with most Chinese tube amps. I have some experience with Primaluna. They are made in China under close supervision from the designer's firm which is based in Holland.
These are very well made amps. Lots of good reviews. They have continuous autobias, which I recommend for people just getting into tube amps.
The main thing you have to watch with the Chinese gear is build quality. It might sound alright for a while- till it breaks. The area of greatest concern are the power supply filter caps. We have seen counterfeit electrolytic caps that are half the marked capacity and also with reduced voltage ratings from what they are marked.
If the build quality is OK then you will find that it probably works and sounds fine, but you will likely pay more for it.
If I were you I would go with a JWN amplifier custom made by Jim Nicholls. He offers a lot of different options; and since you are new to tube amplifiers you can communicate with him directly to find an amp that meets your needs, tastes, budget, etc.. rather than shooting in the dark. His amps are affordable and you get a lot for your money and a direct contact if you have any issues/ questions.