Deep Earth exploration, polar research and marine science are just a few of the key themes set to be showcased at an upcoming exhibition in Chongqing. The event will be hosted by China's Ministry of Natural Resources on April 22 in tandem with Earth Day celebrations. The exhibition aims to highlight China's achievements in Earth science and sustainable development. Several models will be put on display, including the ocean drilling vessel Mengxiang and the Jiaolong manned submersible.