It's sent by using China Post Ordinary Small Packet Plus which is a cheap service of China Post. China Post doesn't provide tracking service for it after it moves for some stations in China. So, only the following information is available:

2019-06-17 07:54
Arrive at the Post Shenzhen International Mail Exchange Bureau

2019-06-17 03:13
Leave Shenzhen International Bulk Mail Processing Center, next stop , Shenzhen International

2019-06-17 02:04
Shenzhen International Bulk Mail Processing Center has received