People view new energy vehicles on display at the fourth World Manufacturing Convention in Hefei, east China's Anhui Province, Nov. 19, 2021. The fourth World Manufacturing Convention kicked off Friday 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. (Xinhua/Huang Bohan)

Photo taken on Nov. 19, 2021 shows the main venue of the fourth World Manufacturing Convention in Hefei, east China's Anhui Province. The fourth World Manufacturing Convention kicked off Friday 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. (Xinhua/Zhang Duan)

A visitor plays a Go game with a robot at the fourth World Manufacturing Convention in Hefei, east China's Anhui Province, Nov. 19, 2021. The fourth World Manufacturing Convention kicked off Friday 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. (Xinhua/Huang Bohan)

Photo taken on Nov. 19, 2021 shows the main venue of the fourth World Manufacturing Convention in Hefei, east China's Anhui Province. The fourth World Manufacturing Convention kicked off Friday 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. (Xinhua/Zhang Duan)

People look at a high-speed maglev train model on display at the fourth World Manufacturing Convention in Hefei, east China's Anhui Province, Nov. 19, 2021. The fourth World Manufacturing Convention kicked off Friday 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. (Xinhua/Han Xu)

Photo taken on Nov. 19, 2021 shows meal boxes made of polylactide heat resistant material at the fourth World Manufacturing Convention in Hefei, east China's Anhui Province. The fourth World Manufacturing Convention kicked off Friday 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. (Xinhua/Zhang Duan)

Photo taken on Nov. 19, 2021 shows a robot at the fourth World Manufacturing Convention in Hefei, east China's Anhui Province. The fourth World Manufacturing Convention kicked off Friday 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. (Xinhua/Zhang Duan)

People look at smart industrial robots on display at the fourth World Manufacturing Convention in Hefei, east China's Anhui Province, Nov. 19, 2021. The fourth World Manufacturing Convention kicked off Friday 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. (Xinhua/Huang Bohan)

People visit the fourth World Manufacturing Convention in Hefei, east China's Anhui Province, Nov. 19, 2021. The fourth World Manufacturing Convention kicked off Friday 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. (Xinhua/Zhang Duan)

People visit the booth of South Korea at the fourth World Manufacturing Convention in Hefei, east China's Anhui Province, Nov. 19, 2021. The fourth World Manufacturing Convention kicked off Friday 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. (Xinhua/Huang Bohan)

Photo taken on Nov. 19, 2021 shows the booth of the Yangtze River Delta region at the fourth World Manufacturing Convention in Hefei, east China's Anhui Province. The fourth World Manufacturing Convention kicked off Friday 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. (Xinhua/Huang Bohan)

People look at intelligent robots on display at the fourth World Manufacturing Convention in Hefei, east China's Anhui Province, Nov. 19, 2021. The fourth World Manufacturing Convention kicked off Friday 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. (Xinhua/Han Xu)

People look at intelligent robots on display at the fourth World Manufacturing Convention in Hefei, east China's Anhui Province, Nov. 19, 2021. The fourth World Manufacturing Convention kicked off Friday 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. (Xinhua/Han Xu)

A staff member displays a walking training device at the fourth World Manufacturing Convention in Hefei, east China's Anhui Province, Nov. 19, 2021. The fourth World Manufacturing Convention kicked off Friday 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. (Xinhua/Zhang Duan)