SHENZHEN - The 21st China Hi-tech Fair concluded in Shenzhen city, South China's Guangdong province on Sunday, according to the organizer.

The five-day event exhibited a total of 2,077 new products and 701 new technologies in 5G, block chain, artificial intelligence chips and other fields, the organizer said.

Themed "Invigorating the Greater Bay Area through Opening-up and Innovation," the fair attracted more than 3,300 exhibitors from over 40 countries and international organizations, with over 10,000 high-tech projects.

The fair received about 576,000 visitors from 108 countries and regions worldwide, according to the organizer.

Chinese authorities in February 2019 unveiled the outline development plan for the Guangdong-Hong Kong-Macao Greater Bay Area, aiming to develop the region into a role model of high-quality development.

The Greater Bay Area consists of Hong Kong, Macao and nine cities in Guangdong -- Guangzhou, Shenzhen, Zhuhai, Foshan, Huizhou, Dongguan, Zhongshan, Jiangmen and Zhaoqing.