It should be delivered now in normal. As 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, you can't get more update after July 7. It usually takes about 40-60 days to be delivered. You'd better contact the seller to give you a solution as soon as possible.

Tracking information available:

2019-07-07 11:01
Nanjing, arriving at Nanjing International Mail

2019-07-07 00:07
Nanjing, leaving the International Bulk Collection Center, the next stop , Nanjing International

2019-07-06 20:09
Nanjing City, "International Bulk Collection Center" has received