Innovation is indispensable for nation to achieve rejuvenation

ON MONDAY, the domestic social media app WeChat replaced its old startup photo of the Earth seen from space with a new one taken by Fengyun 4A, a satellite launched by China last year. cri.cn comments:

The fact that Fengyun 4A can produce a photo showing a semisphere of our planet already indicates how advanced its technologies are. Contrary to popular belief, these photos are composite pictures using many photos stitched together.

Producing a photo of a whole semisphere, therefore, requires great accuracy and stability. Besides, the resolution of the camera must also be high enough to take clear pictures of different parts of the Earth.