Fig. 2

Locations of the tested area. (a) Chengdu in Sichuan Province; (b) Jinjiang District in Chengdu; (c) Chenglong Road Subdistrict in Jinjiang District; (d) Chenglong Road Subdistrict.

Locations of the tested area. (a) Chengdu in Sichuan Province; (b) Jinjiang District in Chengdu; (c) Chenglong Road Subdistrict in Jinjiang District; (d) Chenglong Road Subdistrict.