Hi,
I am from New Delhi, India and I applied for Chinese business visa for 6 months multiple entry but I was granted only single entry 30 days F visa.
So is it possible to get it extended or change it to 6 months multiple entry once I reach there (Beijing). Also if its possible then what all documents are required for getting extension.

I already have visited once China(Beijing) on 1 month single entry F visa and this is my second F visa.

Thanks and regards,
Tribhuwan