I worked on Opencart over 3 years with Chinese language pack for Asia market.
Please note that I can also implement the Simplfied Chinese for you but beware that there is "Great FireWall" in China, thus the audience cannot see and visit your online shop since there is no Google but Baidu, no YouTube but YouKu, thus I can explain you in details if you want marketing to China.
*Please note that this is the Chinese language pack for store front only, if you need the admin Chinese pack, let me know.
*** Please Contact me before placing an ORDER! ***