Visa of CHina(https://www.travelchinaguide.com/embassy/visa.htm) is valid for 3 months, so you can process your visa anytime in Jan. and Feb. Keep in mind that the processing will take 4 working days from Chinese embassy with all required documents well prepared.Your travel agent may handle this if they offer this service and the embassy requires may need an interview or personal appearance. It costs more money than you handling yourself. I still suggest you handle by yourself.