You can see the full history of your parcel here:

http://track-chinapost.com/track_chinapost.php?code=RI608805473CN

Parcel No.RI608805473CN tracking result
Date/Time Location/Status
2015-09-19 09:25:07.0 Dongguan city Post Office eCommerce dept. parcel center received
2015-09-19 09:31:45.0 Dongguan city Post Office eCommerce dept. parcel center customs scan
2015-09-19 12:43:27.0 Guangzhou Transit Station export security scan
2015-09-19 13:57:30.0 Guangzhou Transit Station export customs cleared
2015-09-19 19:46:22.0 leaving Dongguan city Post Office eCommerce dept. parcel center ，next station Dongguan center
2015-09-20 21:55:00.0 arrive Guangzhou Airport
2015-09-20 21:59:16.0 leaving Guangzhou Airport going to next airport/seaport
2015-09-21 02:01:27.0 Guangzhou express 公司 safety check rejected
2015-09-21 02:01:27.0 Guangzhou express 公司 safety check rejected
2015-09-24 22:26:00.0 arrive Guangzhou Airport
2015-09-24 22:29:01.0 leaving Guangzhou Airport going to next airport/seaport
2015-09-27 20:29:00.0 arrive Guangzhou Airport
2015-09-27 20:37:41.0 leaving Guangzhou Airport going to next airport/seaport
2015-09-28 05:57:00.0 Guangzhou departure

It looks like your item had some problem passing the safety check, but then was put back through and passed. Unfortunately, shipping to Bulgaria is very very slow -- average transit time is 37 days, longest on record 90 days. I think you will get your parcel in the next few weeks, but still, you should ask your seller to extend your buyer protection time. Most will, but if they won't, open a dispute.

Quote from GabiZareva on November 24, 2015, 16:52
Hi dear,

two new week have passed. Is it possible that the package may have been lost? If it doesn't arrive till 90 days.. it will never arrive, right?

Thank you!

it is very possible to be lost or rejected.

Quote from pamuk on November 25, 2015, 08:36
RI725606118CN tracking result

Date/Time Location/Status
2015-11-18 04:09:56.0 Dongguan city Post Office eCommerce dept. parcel center received
2015-11-18 04:36:45.0 Dongguan city Post Office eCommerce dept. parcel center customs scan
2015-11-18 04:38:10.0 leaving Dongguan city Post Office eCommerce dept. parcel center ，next station Dongguan center
2015-11-18 06:14:12.0 Guangzhou Transit Station export security scan
2015-11-18 13:22:01.0 Guangzhou Transit Station export customs cleared
2015-11-19 23:37:00.0 arrive Guangzhou Airport
2015-11-19 23:40:24.0 leaving Guangzhou Airport going to next airport/seaport
2015-11-23 01:08:00.0 arrive Guangzhou Airport
2015-11-23 01:12:16.0 leaving Guangzhou Airport going to next airport/seaport
2015-11-23 01:44:55.0 Guangzhou Airport safety check rejected
2015-11-23 01:44:55.0 Guangzhou Airport safety check rejected

please can you help me where is my package?

your parcel can not pass safety check. you should open dispute to seller and claim refund for non-arrival parcel immediately.