I am from Uttarakhand India, I want to visit China in December from 4th December to 10th December

I am from Uttarakhand India, I want to visit China in December from 4th December to 10th December, How can I get visa for my visit to China, Where should I apply in Delhi or Mumbai office, What would be fee & How many days it will take, If I personally visit at your office in Mumbai or Delhi, which is preferbly advise.

I request you please at the earliest so that I can proceed for it.

Thanking you

Suresh Tailor