At the end of the Second Sino-Japanese War, a total of 272 Pashiro class locomotives were taken over by the Republic of China Railway - 177 from Mantetsu and the Manchukuo National, 69 from North China Transport, 8 from the Central China Railway, plus another 18 from other railways.
After the establishment of the People's Republic and the creation of the current China Railway, these locomotives were designated class ㄆㄒ陸 (PX6) in 1951, and in 1959 they were renamed class SL6 (胜利, Shènglì, "victory") and  numbered 301-572.
In common with many steam classes, the cabside number often didn't include the suffix, so SL6 631 would have SL631 painted on the loco.

Between 1956 and 1958, the China Railway's Sifang Locomotive Works in Qingdao built a further 151 units, numbered 601-750 and 771, passing over the numbers used by the SL7 (formerly Pashina) class locomotives.
They were the mainstay of the China Railway's passenger transportation for many years, being used all over China including places as diverse as Nanning, Nanjing, Hailar and Shizuishan.
However, as the weight of passenger trains increased in the 1970s and 1980s, they were progressively relegated to secondary duties.
By 1990, most of the survivors were concentrated in Manchuria, at Dashiqiao, Jilin and Baicheng depots, whilst at the other end of the country, a few remained in use at Chengdu.
The final three, Sifang-built engines SL6 631, 635, and 680, remained in service at Jilin until 1991.
At the end of the Second Sino-Japanese War, a total of 272 Pashiro class locomotives were taken over by the Republic of China Railway - 177 from Mantetsu and the Manchukuo National, 69 from North China Transport, 8 from the Central China Railway, plus another 18 from other railways. After the establishment of the People's Republic and the creation of the current China Railway, these locomotives were designated class ㄆㄒ陸 (PX6) in 1951, and in 1959 they were renamed class SL6 (胜利, Shènglì, "victory") and  numbered 301-572. In common with many steam classes, the cabside number often didn't include the suffix, so SL6 631 would have SL631 painted on the loco.
Between 1956 and 1958, the China Railway's Sifang Locomotive Works in Qingdao built a further 151 units, numbered 601-750 and 771, passing over the numbers used by the SL7 (formerly Pashina) class locomotives. They were the mainstay of the China Railway's passenger transportation for many years, being used all over China including places as diverse as Nanning, Nanjing, Hailar and Shizuishan. However, as the weight of passenger trains increased in the 1970s and 1980s, they were progressively relegated to secondary duties. By 1990, most of the survivors were concentrated in Manchuria, at Dashiqiao, Jilin and Baicheng depots, whilst at the other end of the country, a few remained in use at Chengdu. The final three, Sifang-built engines SL6 631, 635, and 680, remained in service at Jilin until 1991.
China Railways SL6