琼州海峡
Type 63 entered production and service in 1963. The initial production variant was quickly replaced by the Type 63-I which had a more powerful engine, the Model 12150-L2 12-cylinder liquid-cooled diesel engine. In all more than 1,550 Type 63 and Type 63-I amphibious light tanks were made. The tank was designed to operate in the wetland regions and rice paddy fields of southern China (duties also performed by the earlier non-amphibious Type 62 light tank). The Type 63 was intended for inland river and lake crossing operations and amphibious landing in the coastal regions and can swim long distances in harsh sea conditions at high speeds. It can also support infantry in the attack and engage lightly armoured vehicles and fortifications. It can also be used in reconnaissance and patrol roles. Type 63's high amphibious ability was proved in 1966 when it crossed the 31 km long Qiongzhou Strait between mainland China and the Hainan island.