You can download the RPG1K dataset from the following two links.

Google Drive: 
https://drive.google.com/file/d/1QmwD7mY9oIJJGrEHTcPfCctUK9E5ePtZ/view?usp=sharing

or

Baidu Netdisk:
https://pan.baidu.com/s/1wTtfS9vUSSibWalKdy3f7g?pwd=8xb9