1. This is the tracking of all 3 parcel:
Number: YT1629528979220693
Package Status: In Transit
Destination Country: Luxembourg
Origin Country: China
2016-10-29 20:11 brandenbourg,LU, Package arrived at the carrier facility (Yunexpress's Track End)
2016-10-27 13:30 LU, Completed customs clearance process
2016-10-26 10:42 LU, Package arrived at destination airport
2016-10-22 11:25 Guangzhou, China, Departure from airport to destination country
2016-10-22 00:46 SHENZHEN, CHINA, Package has left the carrier facility
2016-10-21 19:44 SHENZHEN, CHINA, Package received by carrier
2016-10-21 17:41 SHENZHEN, CHINA, Package has left seller facility and is in transit to carrier
2016-10-21 12:19 SHENZHEN,CHINA, Waybill Generated
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Number: RD570409475CN
Package Status: In Transit
Destination Country: Luxembourg
2016-10-26 09:38 Beijing, Departure from outward Office of Exchange
Origin Country: China
2016-10-27 03:00 Beijing airport and left
2016-10-27 03:00 Beijing airport terminal, left hand navigation
2016-10-27 00:04 Beijing airport terminal, arrival
2016-10-26 09:43 Exchange Bureau in Beijing, has been exported
2016-10-25 21:59 Exchange Bureau in Beijing, have been exported to open
2016-10-22 15:43 Exchange Bureau in Guangzhou, have been exported to each other (internal transit)
2016-10-22 09:42 Exchange Bureau in Guangzhou, have been exported to open
2016-10-21 23:19 Bulk acceptance packet processing center in Guangzhou, left, the next station "Terminal of Guangzhou"
2016-10-21 20:36 Bulk acceptance packet processing center in Guangzhou, has
2016-10-21 19:56 Guangzhou international mail operation Center has been receiving and sending
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Number: RS293223785CN
Package Status: In Transit
Destination Country: Luxembourg
2016-10-25 16:37 Beijing, Departure from outward Office of Exchange
Origin Country: China
2016-10-26 04:23 Beijing airport and left
2016-10-26 04:23 Beijing airport terminal, left hand navigation
2016-10-26 01:05 Beijing airport terminal, arrival
2016-10-25 16:41 Exchange Bureau in Beijing, has been exported
2016-10-25 13:23 Exchange Bureau in Beijing, have been exported to open
2016-10-22 14:18 Exchange Bureau in Guangzhou, have been exported to each other (internal transit)
2016-10-22 13:24 Exchange Bureau in Guangzhou, have been exported to open
2016-10-21 23:39 Foshan philatelic post office letter, left, the next station "South China Sea"
2016-10-21 22:00 Foshan philatelic post office letter, letter
2016-10-21 16:49 Foshan philatelic post office communications, has received send
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2. The parcel are not frozen, it's just that nobody scan them.

3. For parcel YT1629528979220693, it's already in Luxembourg and should be deliver to you by Luxembourg Post. You can not track that parcel on the Luxembourg Post site. It should come in the mail just like a normal letter.

4. The other 2 parcels, as soon as the Luxembourg Post scan them you will be able to follow them on the Luxembourg Post site. Both parcels have departed China and are On Route to Luxembourg.

5. I would not be surprise that both parcels are in Luxembourg but have not been scan yet by Luxembourg Post because maybe there is to much parcels incoming to Luxembourg. Maximum estimate arrival time from China to Luxembourg is 24 days.

6. Your parcels seems to be fine, you need to be patient and track your parcel on the Luxembourg Post site for any movement.

Hope this help.