Grass-roots science popularization, ~frontline science popularization people, ~ very obedient to the old man ~ ~this old man ~

Grass-roots science popularization, ~frontline science popularizers, ~, very obedient to the old man~~
The old man, immediately off the horse 60 ~, the video shooting time is about 2:00 a.m. on March 11.
Zhengding Science and Technology Museum, curator Qin Ruiqiang.
(Listen to the wind, it was on the edge of Gangnan Reservoir at that time, and the cold wind was blowing ~the surface of the bubble was cool before it opened ~)
Second Shot Video of Cannon Little White Rabbit