19th BEIJING INTERNATIONAL Ndị ahịa ELECTRONICS EXPO Mụtakwuo maka TronHoo na CEE 2020 Ụlọ ntu No.: 1293-1295 Ụlọ Nzukọ A 2020.6.30-7.2 Beijing Etrong International & Convention Center, China Oge nzipu: Mee-18-2020