You Do Need power plug adapter while traveling from Botswana to China.

Here is Why You Need An Adapter

The outlet and plug type used in China are A, C and I and in Botswana are D and G. This is how they look like.

Botswana

In Botswana, outlets of type D and G are in use.

Type D

Type G

China

In China, outlets of type A, C and I are in use.

Type A

Type C

Type I