I have examined...
only one example.
That one was presented to Thai Major General Amnuay Kitsuwan (a good friend, now gone) during his visit to China for the purpose of buying a couple of batteries of 130mm guns.
The pistol was a little gem, beautifully made and finished, furnished in a very nice, lined, pigskin flap-type holster with an extra magazine and cleaning rod. In addition, he had several boxes of the unique ammunition - 25 round square cardboard boxes with the data printed (in Chinese) on the brown tape sealing them. He had never fired it, and obtaining any more of the ammunition was problematic.
Its resemblance to the Lignose Einhand pistol was very marked - I'd really have liked to have been able to talk him out of it, but...
I really liked it!
Later: I looked at the Chinese site linked above - the pistol they illustrate and the one I commented on are NOT the same gun - the illustrated pistol looks very much like a PPK knockoff. I cannot find a reference to the pistol I did examine just now, but am quite certain that it is chambered for the same cartridge (7.62x17mm), and was the first pistol to use it. I am (now) not so certain that the one I saw was classified as a Type 64, but am sure of its characteristics as I described them, and that it was initially made for issue to high-ranking Chinese officers (and, evidently, presentation to similarly-ranking foreign dignitaries). I'll see if I can stir-up a better reference on the pistol I described.
Still later: It appears the pistol I saw was the Norinco Model 77 - which, so far as I knew at the time, was the only pistol chambered for that cartridge (which caused my confusion, I suspect). I still like it! The Type 64 appears to be merely another Walther imitator, and chambered for a unique Chinese round, to boot.
PRD1 - mhb - Mike