Comparing: 121 vs. Object 907

Development began in 1962 on a new medium tank based on the Type 59. The new tank was expected to feature improvements in firepower and armor protection. However, the project was canceled shortly after. Some technical innovations were applied later, in the development of the Type 69 tank. All 121 tank prototypes were destroyed during Chinese nuclear weapon testing.

The decision to start development of a next-generation medium tank was made on July 13th, 1953. Development was carried out by Research Institute No. 100. The project was submitted in March 1954, and at the beginning of 1955 the hull of the new vehicle was tested for shell resistance. However, later the project was canceled.