I have a Chinese integrated tube amp which is designed and built by Cayin. I think it retails for a little over $3500. In any case, I have had it for 6-7 years. I have yet to see any European, American, or Japanese built gear at anywhere near this price point that has the same build quality. It is 95% point-to-point wired (the only circuit board is for the remote control). The solder joints look like silver jewels and the layout is superb. The case, aluminum work, and potted transformers are just lovely to look at. I am not sure any non-Chinese manufacturer can afford to build like this. I have seen point-to-point construction in boutique hand made gear. But those pieces were not even close to the build quality of this Cayin. The signal-to-noise is outstanding. It has great features (like the remote whose volume control by itself is cost-prohibitive for most manufacturers, and the triode/pentode switch which allows for sound-shaping depending on the type of music you are listening to.) It makes the some of the older ARC and Mac gear look cheap by comparison.
I know several people who design and build amps in the USA. They have all commented that they could not afford to build at the same quality level as this Cayin.
And talk about bullet-proof design - this amp has survived two KT88 meltdowns and all I had to do was replace the tube - and a fuse, in one case. By contrast, I have a British amp (whose sound I love) that seriously wiped out some power supply resistors when an EL34 failed. The sound of resistor ceramic exploding and the concomitant stench was impressive. It was not insignificant work to repair it.
Not all Cayin stuff is great quality though. I have two Cayin SACD players that are problematic even though the sound is superb. The mechanical noise from the transport is sometimes more than noticeable on one of them. The other player shorted out somewhere so that the only sound it produces is digital noise.
All of this is to say that you should not harbor anti-Chinese bigotry regarding China's high-end audio manufacturing capability.
The build quality of Hegel and Ayon is probably better than it would have been if it were built in Europe.
By manufacturing in China, they can spec a much better build quality and keep
cost down so that you, the purchaser, get the best product possible.
Further, do not think that Chinese engineers can't do great designs. Ayon and Hegel confer legitimacy on their products because the designs is done by Europeans. But good design engineering knows no borders.