[2023] where is my Chinese PT_76 ?

Originally posted by 1356695285: I have been developing the Chinese PT—76 for a long time, but after the recent update this car disappeared from the technological tree of Chinese tanks, which made me very angry and did not know what to do, it was hard not to get angry really

Sorry, but as we have stated 2 more than two weeks ago here:
https://steamcommunity.com/games/236390/announcements/detail/3665414601840590662

PT-76 (China) - The tank will be hidden (in two weeks from the major update release) from the Chinese ground vehicles tree and will be not available for research. Vehicle will be added to the group with the new unit from this update - the Object 211 and will remain with players who have researched and purchased this unit.

and even earlier on Dev Server preliminary changelog, this vehicle has been hidden from tech tree.