In an alternative twist of history. Germany was not defeated in WW2. The world has changed. See description for more info, and backstory.
The PLA's solution to armoured assaults. The heavy-barreled 45 mm QJZ-335 Anti-Tank Rifle. This is a delayed-blowback, gas-operated, semi-automatic weapon. It comes equipped with a 6.4x magnification rifle scope and bipod. The body is made from high-strength stamped steel with a wooden stock. Ammunition is stored in a 5-round detachable box magazine that comes with an internal jack-up system to lift the rounds as well as a water drainage system to allow the weapon to be brought, unprepared, through river crossings.
Accurate to within 20cm at 650m. Due to the long barrel (in excess of 1.5m), it is inadvisable to fire the weapon from a standing position.