The Back Cloth is rigged separately. The Top Cloth is fitted and has it's own rig added so it will follow a little bit of the weight mapping around the hip and thigh area but you can make adjustments with the Front and Back bones.
V1.1: Rebaked all of the texture maps to fix a few issues like the inner thigh texture not lining up properly. Also refit the Bracers and Armband so they better conform when applying the outfit on someone other than Quan Chi.
MK1 Quan Chi New Era V1.1 Link: https://mega.nz/file/UG9wgYKZ#w5GeB22R9tYRJZMkyRa5crhnLKtImJuTAyGO0v3C2ws