CHINESE tubes?

I have found the Shuguang Black Treasure CV181s and KT88s provide very good sonics and reliability in my Modwright LS100 preamp, and Ayon Spirit 2 integrated, respectively. 

I use either NOS Phillips or Mullard 5AR4s in my Modwright LS100; Elyse DAC, and LineMagnetic 518ia integrated

I recently got a pair of the Treasure C181's for my Don Sachs custom octal-tube based preamp and they are an improvement over all the 50's and 60's NOS 6SL7's I have been using.  They are ultra detailed against a black background.  I don't know about their longevity, but they are by far the best Chinese tubes I have ever heard, clearly bettering the fabulous NOS tubes I had been using and loving.  I bought a quad of them for spare.  Don tried them in his own preamp and his experience mirrors mine.  Check around on eBay for the best prices on them.

My Line Magnetic 518ia's 845s are labelled Line Magnetic but are either Psvane or Shuguang, quiet , nice sounding, reliable so far. 

I have several drawers, (hundreds and hundreds of tubes) full of tubes. Both NOS and new production. I have found the new production Shuguang and Psvane to be as good, if not sometimes better, (depends on the circuit) than any of my NOS tubes from Mullard, Amperex, Telefunken, Siemens, etc.

So saying "all" of the Chinese tubes are bad, it just wrong.

One has to be careful with broad brush statements when their are so many variables at play. I use a mix of NOS & Chinese tubes in my systems with excellent success. The NOS 845's & 300B's were just a little too expensive for my budget. I used the Shuguang ,Nature series & 300B Treasure Series in my Cary 211 amps & I am very happy with the sound as well as the reliability. I had the 300B's cryo treated which kicked their performance up another notch.