A visitor (front, R) experiences products of an exhibitor at the 2018 Beijing International Audiology Conference in Beijing, capital of China, June 2, 2018. The 2018 Beijing International Audiology Conference kicked off here Saturday. (Xinhua/Lu Peng)

Hearing aid equipments are displayed at the 2018 2018 Beijing International Audiology Conference in Beijing, capital of China, June 2, 2018. The 2018 Beijing International Audiology Conference kicked off here Saturday. (Xinhua/Zhang Chenlin)

Hearing aid equipments are displayed at the 2018 Beijing International Audiology Conference in Beijing, capital of China, June 2, 2018. The 2018 Beijing International Audiology Conference kicked off here Saturday. (Xinhua/Zhang Chenlin)

People visit the 2018 Beijing International Audiology Conference in Beijing, capital of China, June 2, 2018. The 2018 Beijing International Audiology Conference kicked off here Saturday. (Xinhua/Lu Peng)

A staff member (2nd, R) answers visitors' inquiry at the 2018 2018 Beijing International Audiology Conference in Beijing, capital of China, June 2, 2018.The 2018 Beijing International Audiology Conference kicked off here Saturday. (Xinhua/Lu Peng)

A visitor (front, R) experiences a hearing aid equipment with a VR device at the 2018 2018 Beijing International Audiology Conference in Beijing, capital of China, June 2, 2018. The 2018 Beijing International Audiology Conference kicked off here Saturday. (Xinhua/Lu Peng)

The 2018 Beijing International Audiology Conference is held in Beijing, capital of China, June 2, 2018.The 2018 Beijing International Audiology Conference kicked off here Saturday. (Xinhua/Zhang Chenlin)