For the 2009 season the park changed the "Amusement" to "Action" in the English writing of their name. The Chinese symbols have not changed. Occasionally the third symbol will be seen written "樂" rather than "乐" -- this is just a difference between traditional and simplified Chinese writing.
Directions:
Jin Jiang Action Park has its own stop on the Shanghai Metro (上海地铁). The Jin Jiang Park Station (锦江乐园站) is on Line 1 (Red) and on the oppisite side of the crossing of Zonghuan Road (中环路) and the Humin Elevated Road (沪闵高架路) from the park.