The SS9 is a type of electric locomotive

Electric locomotive

An electric locomotive is a locomotive powered by electricity from overhead lines, a third rail or an on-board energy storage device...

 used on China Railways

China Railways

China Railways is the national railway operator of the People's Republic of China, under the Chinese Ministry of Railways.China Railways operates rail commuter and freight transport via several smaller companies....

. They are mainly used in pulling sub-highspeed passenger trains.

Developed and built by CSR Zhuzhou Electric Locomotive Works, the SS9 was designed for the fifth national railway speedup, and 2 prototypes were completed on December 26, 1998.

Zhuzhou built 43 first generation SS9's. Beginning in 2002, a modified version of SS9 was designed and built, with body shape similar to the Re 460 locomotive running on Switzerland

Switzerland

Switzerland name of one of the Swiss cantons. ; ; ; or ), in its full name the Swiss Confederation , is a federal republic consisting of 26 cantons, with Bern as the seat of the federal authorities. The country is situated in Western Europe,Or Central Europe depending on the definition....

's national railway, SBB

SBB-CFF-FFS

Swiss Federal Railways and SFR are not in official use) is the national railway company of Switzerland headquartered in Bern. Formerly a government institution, it is since 1999 a special stock corporation with all shares held by the Swiss Confederation or the Swiss cantons...

.

Number SS9-0004 was scrapped and replaced by a new one due to a derailment accident occurred on November 19, 2004.