Launch is from the Taiyuan launch centre in northern China, carrying the Chinese-Brazilian CBERS-4 satellite for Brazil. CBERS-4 is an earth observation satellite intended to measure environmental conditions and changes in Brazilian territory (e.g. deforestation in the Amazon), and is a replacement for the identical CBERS-3 lost in a launch failure last year. The launch is to be streamed by INPE (the Brazilian space agency) here; note the stream will only, as far as I can tell, work on internet explorer. Launch time is to be 3:23 UCT/GMT.