Hi Amorgan,

It's sent by using China Post Ordinary Packet Plus which is a cheap service of China Post. China Post doesn't provide tracking service for it after it arrives at the US secondary processing center. So, you can't get more update after August 20. It usually takes about 60-90 days to be delivered. If you couldn't get it in time, you need to contact the seller to give you a solution as soon as possible.

UU223834140CN:
2021-08-20 16:28 United States, arrive at the SecondAry Processing Center
2021-08-20 16:28 United States, arriving outside the country by transfer
2021-08-20 09:26 San Francisco, arrive at the place of arrival
2021-08-20 09:26 San Francisco, arrive at the consignment center
2021-08-18 13:31 The plane entered the port
2021-08-15 23:06 The plane entered the port
2021-08-09 22:36 Guangzhou City, has been delivered to the carrier transport
2021-08-09 22:36 Guangzhou City, has been delivered to the carrier transport
2021-08-09 22:20 Guangzhou City, leaving the Guangzhou International Mail Processing Center, the next stop of the Guangzhou International Mail Exchange Station (via transfer)
2021-08-08 21:35 Dongguan City, plans to deliver air transport
2021-08-08 12:49 Guangzhou City, Guangzhou International Mail Processing Center has been exported straight
2021-08-07 22:08 Guangzhou City, Arriving at Guangzhou International Mail Processing Center (via)
2021-08-07 19:34 Dongguan City, leaving the Dongguan International Mail Processing Center, the next stop of the Guangzhou International Mail Processing Center
2021-08-06 21:41 Dongguan City, arrived at the Dongguan International Mail Processing Center
2021-08-06 21:38 Dongguan City, leaving the "package express bulk business department backstage support class", the next stop "Dongguan International"
2021-08-06 20:19 Dongguan City, "package express bulk business department backstage support class" has been received