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TheChina Railways TH10 classsteam locomotive was a class of4-6-0 passenger steam locomotives operated by theChina Railway. Originally amongst the first locomotives ordered by theSouth Manchuria Railway (Mantetsu), they were later operated by the privately ownedJichang Jidun Railway and its successor, theManchukuo National Railway, which designated them Tehoni class. The "Teho" name came from theAmerican naming system for steam locomotives, under which locomotives with 4-6-0 wheel arrangement were called "Ten-Wheeler".

These locomotives should not be confused with theMantetsu Tehoni class engines, which were reclassified Tehoi class in 1938.

After rebuilding its lines to standard gauge in 1906, Mantetsu needed new locomotives, and placed several orders withAmerican builders. One of these orders was placed withALCO for four4-4-0 (Amei class) and two 4-6-0 passenger locomotives. These were initially numbered 100 and 101, and with the introduction of Mantetsu's 1907 classification system, they were designated class F and renumbered 600 and 601. These four locomotives were originally built for an American customer but delivered to Manchuria instead; according to Mantetsu records, the original customer was theBoston & Maine Railroad, but according to ALCO records, they were - like the Amei class 4-4-0s - originally built for theChicago Southern Railway (later part of theMilwaukee Road. After brief use on the main line, they were used for mixed trains and goods trains on theAnfeng Line betweenFengtian andAndong.

Mantetsu found it inconvenient to operate a class of only two locomotives, so in 1918 they were both transferred to the Jichang Railway, which in 1931 merged with the Jidun Railway to form theJichang Jidun Railway, where they were numbered 200 and 201. In 1933, theManchukuo National Railway was created through the nationalisation and merger of several privately owned railways, including the Jichang-Jidun Railway, and these locomotives passed on to the Manchukuo National, which classified them Tehoni (テホニ) class, numbered 5621 and 5622, becoming Tehoni 501 and 502 in 1938.

Both were taken over by the Republic of China Railway after the end of thePacific War. Following the establishment of thePeople's Republic and the currentChina Railway, they were designated class ㄊㄏ十 (TH10) in 1951, becoming class TH10 (written inPinyin instead ofZhuyin) in 1959.

• 4-6-0 locomotives
• ALCO locomotives
• Railway locomotives introduced in 1906
• Steam locomotives of China
• Standard-gauge locomotives of China
• Rolling stock of Manchukuo
• Passenger locomotives

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