The session of the Geneva-based Conference on Disarmament is held in Geneva, Switzerland, on May 22, 2019. Chinese ambassador for disarmament affairs Li Song said here on Wednesday that without sufficient mutual trust and respect for each other's security concerns, and without a commitment to common security, nuclear transparency could be "hypocritical and meaningless", or a tool for the strong to bully the weak. (Xinhua/Xu Jinquan)