The Type 69 (Chinese: 69式; pinyin: Liùjiǔ shì) and Type 79 (Chinese: 79式; pinyin: Qījiǔ shì) are Chinese main battle tanks. Both developments of the Type 59 (based on the Soviet T-54A), they were the first main battle tanks developed independently by China. Their lineage can be seen through the distinct gap between the first and second roadwheels. Other improvements included a new engine, ballistic computers, and laser rangefinders.