Hi，

It means it didn't pass the customs check and will be returned back to the sender. You'd better contact the sender to give you a feedback.

UT184432221CN
2019-09-0809:44:00
has been reached to arrive
in Los Angeles
2019-09-0900:57:00
arrive outside the transit bureau
America
2019-09-0900:57:00
arrived [United States] secondary processing center

Hi Kevin K,

It's at the U.S. Secondary Processing Center now. You'd better try to contact USPS to check it. If they couldn't find it, contact the seller to give you a solution as soon as possible:

2019-09-09 00:57
U.S., Arrival at The U.S. Secondary Processing Center

2019-09-09 00:57
United States, Arrival abroad

2019-09-08 09:44
Los Angeles, reached the place of arrival

2019-09-05 21:00
Airline departure

2019-09-04 13:50
Beijing, delivered to air transport

2019-09-02 11:52
Chengdu, International Mail Processing Center has been exported directly

2019-09-02 11:32
Chengdu, International Mail Processing Center has been exported directly

2019-09-01 16:29
Dazhou, leave the postal Dazhou Tongchuan District bulk mail collection, the next station "Chengdu International Mail Processing Center"

2019-09-01 16:20
Dazhou, "Post Dazhou Tongchuan District Bulk Mail Collection" has received, agent: Li Wei

2019-08-30 20:58
Logistics order created