Echoing the national strategy of building the Greater Bay Area encompassing Guangdong, Hong Kong and Macao into an international science and technology innovation center, the 21st China Hi-Tech Fair (CHTF2019) will be held on November 13-17, 2019 in Shenzhen, highlighting the technological innovation achievements and potentials in the Greater Bay Area with the theme “invigorating the Greater Bay Area through Opening Up and Innovation.” Since its inception in 1999, CHTF has become a leadin...