I’ve never seen any credible source that it had a stabiliser. "Type 70” is almost certainly made-up.
Variants, in chronological order:
Type 62: base version, in-game
131-1: Prototype with a new 85mm cannon (APFSDS) and a vertical stabiliser. I imagine this is where the confusion about the “Type 70” with a new 85mm and a stabiliser comes from
Type 62 w/ LRF (no known official name): Type 62s modified (seemingly ad hoc) during the Sino-Vietnamese War with LRFs
Type 62 (late) / ‘Type 62 Gai’ / ‘Type 62-I’ (no known official name): Type 62 with a LRF (different model to above), additional armour around the 12.7mm, slat armour around turret, and sideskirts.
Type 62G (ZTQ62G): Type 62 with entirely new turret and 105mm gun
If I had to guess, this vehicle is one of the earlier Type 62s with the LRF, and was a testbed for smoke grenade launchers. Not sure why they weren’t adopted. It has the older LRF model, not the variant on the Type 62 (late).
This is really biased, but I think we are due for a major China update. There are countless interesting and unique vehicles, along with up-armor kits, APS, and other add-ons for current TT vehicles. Chinese tree could rival the USSR tree if given the chance, although Gaijin would never let it be equal, let alone better than, Soviet tanks.
You’ll get your US/USSR copy-paste as the Pakistan subtree and you’ll like it! You want cool and unique domestic vehicles that are modeled well? What do you think Gaijin is made of? Integrity and a love of their game?!