This Dec 11, 2015 file photo shows an air quality monitor in Beijing, China.  (GREG BAKER / AFP)

SHENZHEN - South China's Shenzhen City on Wednesday launched a real-time air monitoring system as part of its campaign to improve air quality. 

Automatic monitor takes data from 74 PM2.5 monitoring sites. All sites have been connected to a unified platform on May 31. 

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The average density of PM2.5 in Shenzhen was 28 micrograms per cubic meter last year. The target set for 2018 is 26 micrograms. 

The real-time PM2.5 data can be monitored on mobile apps from July 1.

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