I'm planning to go to china to travel around the country

I'm planning to travel around the country for at least over a month since me and my colleagues would like to visit many cities and tourist destinations, Unfortunately when after talking with the Embassy officer She said that as FIRST TIME traveler, I can only be given 14 DAYS {L}... I am a PHILIPPINE passport holder.

QUESTION:
Is it possible to extend it when i'm there?
Why do I get 14 days only when my friends get 3 to 6 months? Is this normal being 1st time traveler?

Please acknowledge
thanks