The guy told me its really valid for 6 month after activating the card. But even if its valid only for 1 month, it will still be a good offer because you can use it direct after arriving in china. You don't have to wait for the first day in the next month.

Question: How long will the 1gb data transfer be valid, the whole 6 month, too? or it it only for use in the first month? if i use only 0,25gb a month it will be valid for 4 month?

Answer: 6 months