Duration of stay for in china first time applicant of tourist visa?

Hello everyone,
My friend from Shanghai who's also my sponsor for this trip already booked me a roundtrip plane ticket (Nov.24-Dec 20)
But I haven't applied my L type yet because I received his documents just this friday, Nov 14, and I'm planning to go to the embassy tomorrow, Nov 17 monday. Do you think guys I will be approved? Because I'm afraid that I'll be denied by the Embassy because of more than 3 weeks stay in the city. I'm not sure if this applied to L type. Please help me.