Some "Ali Express" Seller's have claimed that "China Post" will not transfer to "USPS aka U.S Postal Service" to deliver to "PO Box Addresses?" Another claimed that "China Post" will not deliver "Pocket Knives" or "Survival & Hunting Knives?" What is their policy?

below Post Office Names are they all same?
1, China Post Agency
2, China post
3, South China Post Agency
4, China Post Office
I need to go to the correct China post for enquiry mailing to oversea.
Thank you

AQ322096445CN

03 May 2022
11:31
Arrive at sorting center
【进口海关留存待验】，The import customs keep it for inspection
CHINA POST
30 Apr 2022
10:39
Arrive at sorting center
【美国海关】，customs clearance is in progress
CHINA POST
26 Apr 2022
14:19
Arrive at sorting center
【美国机场】，Arrive at American Airport
CHINA POST
24 Apr 2022
17:12
Departed from 航空公司起运，Departed from airport
航空公司起运，Departed from airport
CHINA POST
23 Apr 2022
16:50
Arrive at sorting center
【航站】，Arrived at airline
CHINA POST
22 Apr 2022
16:20
Departed from 【sorting center
【Shenzhen处理中心】，下一站【航站】，Departed from post office
CHINA POST
21 Apr 2022
10:40
Arrive at 【sorting center
【Shenzhen处理中心】，Arrived to post office
CHINA POST
20 Apr 2022
10:10
Departed from 【南昌】前往深圳邮件处理中心
Processing Center
CHINA POST
19 Apr 2022
17:39
Posting/Collection
Nanchang, Jiangxi
CHINA POST
Tracking number AQ322096445CN
Origin China
Destination United States
Found in China Post
Tracked with couriers China Post
Days in transit 14