A staff member displays a laser printer at the 4th World Manufacturing Convention in Hefei, east China's Anhui Province, on Nov. 21, 2021. The 4th World Manufacturing Convention kicked off on Nov. 19 in the city. The four-day event, themed "innovation-driven, digitally empowered: global manufacturing industry aligned for high-quality growth," aims to promote high-quality manufacturing and deepen exchanges between China and the rest of the world. (Photo by Zhang Yipu)

A staff member displays a cloud computer at the 4th World Manufacturing Convention in Hefei, east China's Anhui Province, on Nov. 21, 2021. The 4th World Manufacturing Convention kicked off on Nov. 19 in the city. The four-day event, themed "innovation-driven, digitally empowered: global manufacturing industry aligned for high-quality growth," aims to promote high-quality manufacturing and deepen exchanges between China and the rest of the world. (Photo by Zhang Yipu)

A visitor plays a Go game with a robot at the 4th World Manufacturing Convention in Hefei, east China's Anhui Province, on Nov. 21, 2021. The 4th World Manufacturing Convention kicked off on Nov. 19 in Hefei, capital of east China's Anhui Province. The four-day event, themed "innovation-driven, digitally empowered: global manufacturing industry aligned for high-quality growth," aims to promote high-quality manufacturing and deepen exchanges between China and the rest of the world. (Photo by Zhang Yipu)

Intelligent robots are displayed at the 4th World Manufacturing Convention in Hefei, east China's Anhui Province, on Nov. 21, 2021. The 4th World Manufacturing Convention kicked off on Nov. 19 in Hefei, capital of east China's Anhui Province. The four-day event, themed "innovation-driven, digitally empowered: global manufacturing industry aligned for high-quality growth," aims to promote high-quality manufacturing and deepen exchanges between China and the rest of the world. (Photo by Zhang Yipu)

Photo taken on Nov. 21, 2021 shows the pavilion of the Republic of Korea (ROK) at the 4th World Manufacturing Convention in Hefei, east China's Anhui Province. The 4th World Manufacturing Convention kicked off on Nov. 19 in Hefei, capital of east China's Anhui Province. The four-day event, themed "innovation-driven, digitally empowered: global manufacturing industry aligned for high-quality growth," aims to promote high-quality manufacturing and deepen exchanges between China and the rest of the world. (Photo by Zhang Yipu)

Goods from the China International Import Expo are showcased at the 4th World Manufacturing Convention in Hefei, east China's Anhui Province, on Nov. 21, 2021. The 4th World Manufacturing Convention kicked off on Nov. 19 in Hefei, capital of east China's Anhui Province. The four-day event, themed "innovation-driven, digitally empowered: global manufacturing industry aligned for high-quality growth," aims to promote high-quality manufacturing and deepen exchanges between China and the rest of the world. (Photo by Zhang Yipu)