CN metropolis must-have: Userfriendly & beautifully done

Easy to use, all important information at your dingertips, older or more detailles one only one level away. Intuitive to read & promoting responsible behaviour concerning your own & loved ones health.
We downloaded it during our 2-month trip to China & used it in all major cities; still checking from time to time thinking of people important to us & living in PRC.

GoodMorningLille about Air Matters, v4.0.4