Xi Urges Accelerated Efforts to Modernize National Security System, CapacityXi Urges Accelerated Efforts to Modernize National Security System, CapacityChangbai Mountain launches serial summer eventsChina's air passenger trips to reach 9 million during May Day holidayXi Sends Congratulatory Letter to Zhongguancun ForumFamily garden becomes a hit with international visitorsChangbai Mountain launches serial summer eventsXi Sends Congratulatory Letter to Forum on Development of TibetChina, DRC Upgrade Ties to Comprehensive Strategic Cooperative PartnershipXi Visits Beijing School Ahead of International Children's Day