Xyoo 2020, qhov kev nthuav qhia thev naus laus zis thiab khoom siv hauv Nanjing Industrial Energy Conservation thiab Environmental Protection Technology thib ob tau xaus rau qhov zoo.

Nyob zoo rau Nanjing thiab ntsib koj hauv Shanghai!

Pom koj hauv Shanghai thaum Lub Yim Hli 13, 2020!