1. I will start first by giving you the result of the tracking of your 2 parcels:

Number: LK142462664CN
Package Status: Not Found
Destination Country: Unknown
Origin Country: China
Item is not found at this moment, If necessary, please verify with the package sender and check back later.
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Number: LT484726918CN
Package Status: In Transit

Destination Country: United States
2016-12-12 21:40 Origin Post is Preparing Shipment, We have received notice that the originating post is preparing to dispatch this mail piece.
2016-12-12 21:40 CHINA, GUANGZHOU EMS, Processed Through Facility
2016-12-01 20:39 CHINA, Acceptance

Origin Country: China
2016-12-13 00:00 Guangzhou, from Guangzhou to Hong Kong (change)
2016-12-01 21:41 Guangzhou Customs clearance
2016-12-01 21:40 Guangzhou, to the customs
2016-12-01 20:39 Guangdong postal courier logistics international business sales department huadiwan – vote has been received (the embrace cast member name: He Wenzheng, Tel:)
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2. For parcel LK142462664CN, the parcel was never mail by the seller.

3. For parcel LT484726918CN, the additional info is this:
Your parcel is going to JFK.

4. So your parcel LT484726918CN is On Route/In Transit to USA via Hong Kong then to JFK Airport. Your parcel was delayed in China possibly by the Holiday Season, the Smog that prevented Aircraft to depart and rescheduling of parcels.

5. There is some US person here receiving their parcels after over 50 days and the longest so far is 66 days.

6. Now what needs to happen is USPS scan your parcel on Arrival or when they have time to do it. Otherwise you will not have any tracking on the USPS site and they will tell you the parcel is in China. But according to the image that you provided they where OK by telling you that there was no acceptance scan of the parcels.

7. Just keep tracking your parcel (LT484726918CN) on the USPS site for any new movement.

Thanks.