According to the tracking result, it didn't pass the customs check in Shenzhen and still in Shenzhen Exchange Bureau waiting for checking again. You'd better contact the sender and let him call China Post to ask what happened to it. Only the sender could get official answer from China Post as he knows the information China Post requires.

2017-01-22 13:36
The Shenzhen Exchange Bureau, import each other (internal transit)

2017-01-22 13:32
The Shenzhen Exchange Bureau, import opening

2017-01-22 13:31
The Shenzhen Exchange Bureau, have been exported to each other (internal transit)

2017-01-22 00:37
The Shenzhen Exchange Bureau, have been exported to open

2017-01-21 15:31
Shenzhen international bulk mail processing center,

2017-01-21 12:56
Shenzhen international bulk mail processing center has been receiving and sending

2017-01-17 15:06
Electronic information has been received