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I will look for a manual in that language now... in a few minutes I will post with results of that search... thank you for your patience meanwhile.
Garmin does not offer a manual for this model in any form of Chinese dialect, I regret to have to say.
I will look for another source elsewhere for a manual in Chinese for this or a related model of Garmin Nuvi.
No manual is available that I can find, in any Chinese dialect, for any Garmin Nuvi model.
These devices are capable of giving directions in any Chinese dialect, though.
Let me know whether I can offer any further help in any form.