China is the land of the copy. They are all copying the Americans or elsewhere and each other.

I have seen the same RCA connector design multiple times on eBay and they either look the same with a different brand name or are actually slightly different in manufacture of the same design because they are an inexact copy.

They do it with medicine, booze, food etc. It is a real problem especially for the local Chinese. So buyer beware. I am sure it extends to hi-fi but also fairly sure hi-fi copying isn't so prolific as other areas.

There may be bootleg Xiangs around. Those Xiangs may even use bits destined for the OEM, but made to lesser QC. I am only speculating here. But I reckon it is well possible.