wikimedia and pickupimage.
It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
This image was acquired from
Keywords from Image Description:
Haikou skyline . en Haikou skyline Hainan Province China own Anna Frodesiak Cityscapes in Haikou Files by User Anna Frodesiak Residential buildings in Haikou
Page 2017 Free-images.com. All images are Public Domain