A staff member (R, front) shows visitors a hydrogen-powered drone at the seventh China (Shanghai) International Technology Fair (CSITF) in east China’s Shanghai, April 18, 2019. The seventh China …
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The Shanghai News
A staff member (R, front) shows visitors a hydrogen-powered drone at the seventh China (Shanghai) International Technology Fair (CSITF) in east China’s Shanghai, April 18, 2019. The seventh China …
( read original story …)