Please explain why this was delivered to nuneaton DO when I live in london

AS411878081CN

In Transit

China
China Post
United Kingdom
Royal Mail
Destination - Tracking consuming: 602 ms
Origin - Cached time: 2020-07-06 13:29:57 (GMT+01:00)
2020-07-03 23:29
GB, mail in domestic transshipment

2020-07-03 13:29
LONDON, customs processing, please contact LONDON for details

2020-07-03 12:29
LONDON, customs processing, please contact LONDON for details

2020-07-03 07:29
LONDON, GET TO LONDON

2020-07-02 20:44
LONDON, mail has been cleared and sent to the airport

2020-07-01 15:40
LONDON, GET TO LONDON

2020-06-30 10:05
Shenzhen, China, leaving Shenzhen, China

2020-06-30 06:13
Shenzhen, China, Arriving in Shenzhen, China

2020-06-29 22:44
Guangzhou City, leaving the "Provincial International Mei Garden Business Department", the next stop "Shenzhen Post Expre

Tracking said departed London on the 23rd of March then next update said processed through a facility in China in transit to destination on the 26th with no further updates .
Why say departed London then arrive in China ?
What’s happening, should I be worried ?