In 2015, Liu Yuan did not obtain the vice-national-level CPPCC vice-chairmanship, subsequently withdrew from the political stage, and was assigned to a related position in the National People's Congress.
On November 24, 2015, the Shijiazhuang Intermediate People's Court sentenced Jia Jinglong to death for intentional homicide in a first-instance ruling and deprived him of political rights for life; Jia Jinglong subsequently appealed.
Chinese President Xi Jinping met US congressional leaders during his visit to the United States, with Senate Majority Leader McConnell ranking first.
During Xi Jinping's arrival in Washington, official CCP reports claimed that thousands of local overseas Chinese voluntarily took to the streets to welcome him, holding banners such as 'Hello Big Daddy Xi, welcome Peng Mama.'
Chinese hackers infiltrated the U.S. Office of Personnel Management, stealing security clearance files of over 21 million current and former federal employees.
From July 9, 2015, Chinese police (Public Security) carried out large-scale arrests, summons and detentions of over a hundred rights lawyers, rights defenders and their relatives across 23 provinces, an event known as the 709 crackdown.
In 2015, former Vice Chairman of the Central Military Commission Guo Boxiong was investigated, further consolidating Xi Jinping's power within the military.
On April 7, 2015, Liu Xiang published a long post titled "My Track! My Hurdles" on Weibo, officially announcing his retirement; the Chinese Athletics Association promptly issued a letter of thanks.
After Liu Xiang retired in April 2015, the Shanghai Sports Bureau kept his personnel relations on file for a long time; it was not until September 2026 that he chose to become self-employed, and the procedures were basically completed on September 7.
In March 2015, Colombian customs intercepted a 28,000-ton COSCO cargo ship bound for Cuba, finding 99 rockets, 3,000 artillery shells, 100 tons of military-grade explosives, and 2.6 million detonators, all manufactured by China North Industries Corporation and hidden beneath declared goods.
On February 19, 2015 (the first day of the Lunar New Year), at a Spring Festival gathering in Beigaoying Village, Chang'an District, Shijiazhuang, Jia Jinglong shot and killed He Jianhua, the village Party branch secretary and village committee director, with a modified nail gun, over the forced demolition of his marital home in 2013.
The U.S. Department of Justice criminal complaint states that during Xi Jinping's 2015 visit to the U.S., Lu Jianwang and other overseas Chinese association leaders requested each group to organize 15 people to go to Washington to confront other protesters, and were awarded plaques by a deputy bureau chief of the Ministry of Public Security.
Merkel's open-border policy led to a massive influx of illegal migrants from North Africa, the Middle East and other regions into Europe, triggering a subsequent series of public security and integration crises.
In 2015, Chinese agents infiltrated the U.S. Office of Personnel Management and stole security clearance background check files of more than 21 million current and former federal employees, including fingerprints, financial records, foreign contacts, psychological evaluations, marital issues, medical records and other sensitive background investigation materials.
In 2015, Shi Zhengli of the Wuhan Institute of Virology took part in a study that synthesized a chimeric SARS-like coronavirus to understand its ability to infect humans; the hybrid virus described in the paper carried the spike protein of a Chinese horseshoe bat coronavirus.