How long are the Chinese blades and what kind of alt do you have them on? Do they make good power for you?
I've had, and got, a variety.
The original (junk) ones were just under 10' diameter, junky hard fibreglass with hard edges and not much profile. I ground them, painted them, balanced them, and got reasonable performance from them but lousy start-up.
After they were destroyed by a tree going through it during a storm:
I rebuilt the head, and bought some new blades and hub (which needed some machining to fit the old generator head)
These started up much better, were far quieter and produced more watt-hours per typical day, but were down a little in top-end power for some reason I'm at a loss to explain. Perhaps in all the rebuilding, the alternator lost some output.
This old mill makes around 1KW peak in strong winds.
I have another one I still have not put up yet. It's 2.5KW and I have little doubt it'd make that easily in a decent wind.
Its prop is just over 14' diameter. I have a picture from when I was balancing it, but it's pretty awkward to manage inside and impossible to do outside except when it's dead calm (almost never!)
I've got another 7.5KW of PV to put up, so I honestly don't see this new mill ever flying.