1. This is the full tracking of your parcel:
China Post Register Air Mail Tracking System
Parcel No.03674971812 tracking result
2016-09-07 20:54:57.0 Electronic Data Received
2016-09-20 19:32:23.0 China Post Group 浙江省Yiwu city 邮购配送公司 received
2016-09-20 23:31:00.0 China Post Group 浙江省Yiwu city 邮购配送公司 customs scan
2016-09-21 01:05:00.0 leaving China Post Group 浙江省Yiwu city 邮购配送公司
2016-09-21 23:31:00.0 计划going to next airport/seaport ，计划航班号MH389-004，计划起飞时间16:05

2. First of all, you can notice your parcel was never put into the China mail system before the 20 Sep. Tomorrow it will be 6 week that your parcel has been on the road.

3. If you think that your parcel is lost, then contact seller and tell him so. Parcel should be deliver to you by Royal Mail just like a normal letter. 30 to 60 days is the delivery average for those type of parcel.

Hope this help.