An exhibitor talks with a visitor at a fire detection system stall during the Asia Pharma Expo in Dhaka, Bangladesh, on Feb. 28, 2020. Focusing on medical and pharma-tech products and services, Asia Pharma Expo is held in Dhaka from Feb. 28 to March 1, 2020. (Str/Xinhua)

People watch a pharmaceutical equipment during the Asia Pharma Expo in Dhaka, Bangladesh, on Feb. 28, 2020. Focusing on medical and pharma-tech products and services, Asia Pharma Expo is held in Dhaka from Feb. 28 to March 1, 2020. (Str/Xinhua)

People visit the Asia Pharma Expo in Dhaka, Bangladesh, on Feb. 28, 2020. Focusing on medical and pharma-tech products and services, Asia Pharma Expo is held in Dhaka from Feb. 28 to March 1, 2020. (Str/Xinhua)

Exhibitors show a tablet making machine during the Asia Pharma Expo in Dhaka, Bangladesh, on Feb. 28, 2020. Focusing on medical and pharma-tech products and services, Asia Pharma Expo is held in Dhaka from Feb. 28 to March 1, 2020. (Str/Xinhua)

Various pills are on display during the Asia Pharma Expo in Dhaka, Bangladesh, on Feb. 28, 2020. Focusing on medical and pharma-tech products and services, Asia Pharma Expo is held in Dhaka from Feb. 28 to March 1, 2020. (Str/Xinhua)

People watch pharmaceutical devices during the Asia Pharma Expo in Dhaka, Bangladesh, on Feb. 28, 2020. Focusing on medical and pharma-tech products and services, Asia Pharma Expo is held in Dhaka from Feb. 28 to March 1, 2020. (Str/Xinhua)

A visitor looks at a laboratory flask during the Asia Pharma Expo in Dhaka, Bangladesh, on Feb. 28, 2020. Focusing on medical and pharma-tech products and services, Asia Pharma Expo is held in Dhaka from Feb. 28 to March 1, 2020. (Str/Xinhua)

An exhibitor shows medicines during the Asia Pharma Expo in Dhaka, Bangladesh, on Feb. 28, 2020. Focusing on medical and pharma-tech products and services, Asia Pharma Expo is held in Dhaka from Feb. 28 to March 1, 2020. (Str/Xinhua)