About the Vehicle:
The IXKPz 3 Projekt 07 HK has Siege mode, which is activated manually—just like with Swedish high-tier TDs—improving the effective gun depression angle to 12 degrees. Its basic APCR rounds fly very quickly, the special HEAT rounds have high penetration for Tier IX, and the HE rounds have outstandingly high penetration for this shell type. The vehicle has a low silhouette, and its mobility while in Siege mode easily allows you to roll back after a successful shot without switching to Travel mode.
About the Vehicle:
The IXBZ-58-2 is a bit unlike your typical Chinese breakthrough heavy. It packs a powerful punch, has a sturdy turret, and is a bit slow to aim. However, the gun is rather precise for a heavy and has an 8 degree depression angle, which—together with a bouncy upper glacis plate—makes terrain-based play a viable option.
More reasons to spam gold ammo, as if this community needed any.