@ Mirage: As to a relationship between this and the Type 99? T99 is longer, heavier and wider well VT4 is just a little taller they may share the same gun both are listed as 125mm smooth bores. the engines may be related but VT4 is inferior.
Turrets look close as to the hull chassis ( both have 6 road wheels). They seem to me to be kissing cousins. likely sharing elements of there Chassis, possibly guns, basic fire control systems, hatches perhaps base turret and automotive parts. Armor wise hard to guess we know it has modules on it's hull this might be composite or ERA or both. the hull armor is likely closely related but probably not as advanced as that found on the latest 99 tanks maybe the same armor used on the first of the 99's. Both tanks likely use the same accessory systesm in terms of options for RWS or Commanders MG, coax and Smoke grenade