The Chinese Type 51 was nothing more than a locally-produced Chinese copy of the famed Soviet Tokarev TT-33 semi-automatic pistol series. The TT-33 was itself developed as a production-friendly form of the original TT-30 series during World War 2. Furthermore, the TT-30 itself was developed from the world-renowned Colt-Browning M1911 pistol.
While generally perceived of as a direct copy of the Soviet style, the Chinese Type 51 incorporated more grooves (and narrower in form) along its slide. Beyond that, the two pistols were nearly identical in form and function. The Type 51 brought with it the heavy recoil of the Soviet model, making them slightly inaccurate to an extent - particularly in the hand of a new operator. The Type 51 also made use of the 7.62x25mm Soviet M30 cartridge, these in an eight round detachable box magazine fitting into the pistol grip. Sights were noted at front and rear and, overall, the Type 51 exhibited much of the appearance found in many semi-automatic handguns following the inception of the Colt M1911.