Ni wiwo ti aidaniloju ti ipo ajakale-arun ni Guangzhou, Guangzhou Guangya Frankfurt Exhibition Co., Ltd. kede ifilọ ti Guangzhou International Light Exhibition ati Ifihan Imọ-ẹrọ Itanna International ti Guangzhou International.
Akoko ifiweranṣẹ: Oṣu Karun-31-2021