1. This is the tracking of your parcel:
Number: RI973721343CN
Package Status: In Transit
Destination Country: Italy
2016-10-09 13:57 China, International Trade Center started
2016-10-08 15:49 China, taking charge abroad
Origin Country: China
2016-10-09 13:39 Exchange Bureau in Guangzhou, have been exported directly
2016-10-09 10:55 Exchange Bureau in Guangzhou, have been exported to open
2016-10-08 23:14 Bulk acceptance packet processing center in Guangzhou, left, the next station "Terminal of Guangzhou"
2016-10-08 19:59 Bulk acceptance packet processing center in Guangzhou, has
2016-10-08 15:49 Guangzhou international mail operation Center has been receiving and sending
Powered by http://www.track-chinapost.com

2. And another tracking:
International Mail# RI973721343CN Tracking Result
Summary
Tracking number Origin Destination Status
RI973721343CN CHINA ITALY On route

History Detail
Local date/time Activity Location Remarks
08-Oct-2016 15:49 Received by Post Office 51001020
09-Oct-2016 13:57 Departure export customs GUANGZHOU

3. So according to the above tracking we know that the parcel is On Route to Italy. May I suggest you read this for Italy:
http://track-chinapost.com/China_Post_Arrival_Time_Stat.php

4. When your parcel will be scan by Italy Post you will be able to track it on the Italy Post site. Your parcel is fine you just need to wait for it.

Hope this help.

Thank you so much! It's very strange because I bought something from this shop and the parcel arrived after 10 or 15 days...this time after 21 days the parcel didn't have update.