Question: Who is the child of the person who ruled the biggest owner of US debt during the Tiananmen Square protests of 1989?

full_context: Document 1: Zhang Baosheng: Some high-ranking Communist Party leaders in Beijing grew curious at reports of Zhang's alleged powers, and Zhang was one of the "Healers with Extraordinary Powers" invited into the Zhongnanhai leadership compound to treat the daughter-in-law of General Chen Geng.
Document 2: National debt of the United States: As of July 31, 2018, debt held by the public was $15.6 trillion and intragovernmental holdings were $5.7 trillion, for a total or ``National Debt ''of $21.4 trillion. Debt held by the public was approximately 77% of GDP in 2017, ranked 43rd highest out of 207 countries. The Congressional Budget Office forecast in April 2018 that the ratio will rise to nearly 100% by 2028, perhaps higher if current policies are extended beyond their scheduled expiration date. As of December 2017, $6.3 trillion or approximately 45% of the debt held by the public was owned by foreign investors, the largest being China (about $1.18 trillion) then Japan (about $1.06 trillion).
Document 3: National debt of the United States: On November 7, 2016, debt held by the public was $14.3 trillion or about 76% of the previous 12 months of GDP. Intragovernmental holdings stood at $5.4 trillion, giving a combined total gross national debt of $19.8 trillion or about 106% of the previous 12 months of GDP. As of December 2017, $6.3 trillion or approximately 45% of the debt held by the public was owned by foreign investors, the largest of which were Japan (about $1.06 trillion) and China (about $1.18 trillion).
Document 4: National debt of the United States: On November 7, 2016, debt held by the public was $14.3 trillion or about 76% of the previous 12 months of GDP. Intragovernmental holdings stood at $5.4 trillion, giving a combined total gross national debt of $19.8 trillion or about 106% of the previous 12 months of GDP; $6.2 trillion or approximately 45% of the debt held by the public was owned by foreign investors, the largest of which were Japan and China at about $1.09 trillion for Japan and $1.06 trillion for China as of December 2016.
Document 5: Zhang Lifan: Zhang's father, Zhang Naiqi (), was one of the founders of the China National Democratic Association, Zhang's mother is Zhang Caiping (). Zhang spent his childhood in his hometown of Beijing. He attended High School attached to Tsinghua University (). In 1957, Zhang Naiqi, Zhang Bojun (), Chu Anping () and Luo Longji () were picked out as right wingers. On 8 June 1957, Zhang Naiqi was removed from his posts and taken to be prosecuted. Zhang Lifan was punished because of his father. On 13 May 1977, Zhang Naiqi died of illness in a Beijing Hospital basement. After the Cultural Revolution, Zhang Lifan was educated in the Institute of Modern History of Chinese Academy of Social Sciences ().
Document 6: Shi Tiesheng: In 1969 he was a "sent-down youth" or urban youth sent to a rural area of Shaanxi as part of the Down to the Countryside Movement of the Cultural Revolution. There he was paralyzed in an accident at the age of 21, and was sent back to Beijing.
Document 7: Deng Xiaoping: Between 1927 and 1929, Deng lived in Shanghai, where he helped organize protests that would be harshly persecuted by the Kuomintang authorities. The death of many Communist militants in those years led to a decrease in the number of members of the Communist Party, which enabled Deng to quickly move up the ranks. During this stage in Shanghai, Deng married a woman he met in Moscow, Zhang Xiyuan.
Document 8: Mao Zedong: Mao Zedong (December 26, 1893 -- September 9, 1976), commonly known as Chairman Mao, was a Chinese communist revolutionary who became the founding father of the People's Republic of China, which he ruled as the Chairman of the Communist Party of China from its establishment in 1949 until his death in 1976. His theories, military strategies, and political policies are collectively known as Maoism.
Document 9: Bombard the Headquarters: It is commonly believed that this "big-character poster" directly targeted Chinese President Liu Shaoqi and senior leader Deng Xiaoping, who were then in charge of Chinese government's daily affairs and who tried to cool down the mass hysteria which had been coming into shape in several universities in Beijing since the May 16 Notice, through which Mao officially launched the Cultural Revolution, was issued.
Document 10: National debt of the United States: As of July 31, 2018, debt held by the public was $15.6 trillion and intragovernmental holdings were $5.7 trillion, for a total or ``National Debt ''of $21.3 trillion. Debt held by the public was approximately 77% of GDP in 2017, ranked 43rd highest out of 207 countries. The Congressional Budget Office forecast in April 2018 that the ratio will rise to nearly 100% by 2028, perhaps higher if current policies are extended beyond their scheduled expiration date. As of December 2017, $6.3 trillion or approximately 45% of the debt held by the public was owned by foreign investors, the largest being China (about $1.18 trillion) then Japan (about $1.06 trillion).
Document 11: Guang'an: Guang'an () is a prefecture-level city in eastern Sichuan province. It is most famous as the birthplace of China's former paramount leader Deng Xiaoping. Guang'an lies between the hills of central Sichuan and the gorges area of the east.Guang'an is the only "Sichuan Chongqing Cooperation Demonstration Zone" in Sichuan and the nearest prefecture level city from the main city of Chongqing. It has been incorporated into the 1 hour economic circle of Chongqing. Because of its strategic location, it is called the "Gateway to Eastern Sichuan". Its population as of 2010 census was 3,205,476. whom 858,159 lived in the built-up ("or metro") area made of 2 urban districts.
Document 12: National debt of the United States: As of April 30, 2018, debt held by the public was $15.3 trillion and intragovernmental holdings were $5.7 trillion, for a total or ``National Debt ''of $21 trillion. Debt held by the public was approximately 77% of GDP in 2017, ranked 43rd highest out of 207 countries. The Congressional Budget Office forecast in April 2018 that the ratio will rise to nearly 100% by 2028, perhaps higher if current policies are extended beyond their scheduled expiration date. As of December 2017, $6.3 trillion or approximately 45% of the debt held by the public was owned by foreign investors, the largest being China (about $1.18 trillion) then Japan (about $1.06 trillion).
Document 13: 1989 Tiananmen Square protests: Party and government leaders Name Position (s) in 1989 Deng Xiaoping Chairman of the Central Military Commission; de facto ``paramount leader ''Chen Yun Chairman of the CPC Central Advisory Commission Zhao Ziyang General Secretary of the Communist Party of China First Vice-Chairman of the Central Military Commission Li Peng Premier of the People's Republic of China Qiao Shi Secretary of the CPC Central Commission for Discipline Inspection Secretary of the CPC Political and Legislative Affairs Committee Hu Qili First Secretary of the Secretariat of the Communist Party Yao Yilin First Vice Premier of the People's Republic of China Yang Shangkun President of the People's Republic of China Vice-Chairman of the Central Military Commission Li Xiannian Chairman of the Conference National Committee Wan Li Chairman of the Congress Standing Committee Wang Zhen Vice President of the People's Republic of China Jiang Zemin Communist Party Shanghai Municipal Secretary Li Ximing Communist Party Beijing Municipal Secretary Zhu Rongji Mayor of Shanghai Chen Xitong Mayor of Beijing Hu Jintao Communist Party Tibet Regional Secretary Wen Jiabao Chief of the General Office of the Communist Party of China Bold text indicates membership in the Politburo Standing Committee Italics text indicates Great Eminent Officials
Document 14: Deng Pufang: Deng Pufang () (born 16 April 1944) is the first son of China's former Paramount leader Deng Xiaoping. He is mostly known for being crippled by the Red Guards and becoming a paraplegic. He has since dedicated his life to improving the rights of people with disabilities.
Document 15: Yang Shangkun: Yang Shangkun (3 August 1907 – 14 September 1998) was President of the People's Republic of China from 1988 to 1993, and was a powerful Vice Chairman and Secretary-General of the Central Military Commission under Deng Xiaoping. He married Li Bozhao in 1929, one of the few women to participate in the Long March, as did Yang.
ground_truth: Deng Pufang
sub_queries: who is the biggest owner of us debt Answer: China
who ruled China during the tiananmen square protests of 1989 Answer: Deng Xiaoping
Deng Xiaoping >> child Answer: Deng Pufang