Question: When is Crown Prince Uiso's mother's birthday?

Knowledge 1: Crown Prince Uiso
Crown Prince Uiso (hangul:의소세자 hanja:懿昭世子 ; 27 September 1750 - 17 April 1752) was a Crown Prince of Korea in the Joseon dynasty, the son of Crown Prince Sado and Lady Hyegyeong and was third in line of succession to the throne to King Yeongjo.He was the brother of King Jeongjo and elder half-brother of Prince Euneon, Prince Eunsin and Prince Eunjeon.His Korean name was Yi Jeong(hangul:이정 hanja:李琔) and his chinese name was Changheung(hangul:창흥 hanja:昌興).His mother, Lady Hyegyeong, of Pungsan was from a famous royal family line.His maternal grandfather was Hong Bong-han, whose younger brother was Hong In-han, a minister and later Prime Minister of that time.He was the first grandson of the 21st King Yeongjo of Joseon and his father, Crown Prince Sado, was the illegitimate second son of King Yeongjo.King Yeongjo's first son, Crown Prince Hyojang, died at the age of 10, leaving Crown Prince Sado as King Yeongjo's only male descendant.King Yeongjo hoped for another son but instead bore only daughters.Uiso's father Crown Prince Sado had a severe mental illness and was often at odds with his father, King Yeongjo.Crown Prince Sado favoured the political party Soron, while King Yeongjo supported the ruling party Noron.Later King Yeongjo had his son, Crown Prince Sado, executed by locking him in a rice chest and starving him.On September 27, 1750 he was born Changkyong Kung Gyeongchun Jeon, in Hanseong.King Yeongjo expected great things from him.On May 13, 1751 King Yeongjo declared him the political heir.In November 1751, his aunt Lady Hyeonbin died, then soon after on 17 April 1752, Crown Prince Uiso died Tongmyongjeon.His grandfather King Yeongjo took the deaths hard and severed from psychological trauma for some time.He was given a state funeral of Joseons, from special instructions of King Yeongjo.His body was buried to the south of Mt. Ahnhyon(안현 鞍峴), Bugahyeon-dong in Hanseong.King Yeongjo named his grave Uiso grave and wrote the epitaphs, erecting a tombstone.In 1870, his grave name was Uiryong Park(의령원 懿寧園).In June 7, 1949, his grave was moved to Wondang in Goyang. [SEP] Knowledge 2: Lady Hyegyeong
Lady Hyegyeong (6 August 1735 – 13 January 1816), also known as Queen Heongyeong, was a Korean writer and noblewoman during the Joseon Dynasty.She was the wife of Crown Prince Sado and mother of King Jeongjo.
Knowledge 1: Crown Prince Uiso
Crown Prince Uiso (hangul:의소세자 hanja:懿昭世子 ; 27 September 1750 - 17 April 1752) was a Crown Prince of Korea in the Joseon dynasty, the son of Crown Prince Sado and Lady Hyegyeong and was third in line of succession to the throne to King Yeongjo.He was the brother of King Jeongjo and elder half-brother of Prince Euneon, Prince Eunsin and Prince Eunjeon.His Korean name was Yi Jeong(hangul:이정 hanja:李琔) and his chinese name was Changheung(hangul:창흥 hanja:昌興).His mother, Lady Hyegyeong, of Pungsan was from a famous royal family line.His maternal grandfather was Hong Bong-han, whose younger brother was Hong In-han, a minister and later Prime Minister of that time.He was the first grandson of the 21st King Yeongjo of Joseon and his father, Crown Prince Sado, was the illegitimate second son of King Yeongjo.King Yeongjo's first son, Crown Prince Hyojang, died at the age of 10, leaving Crown Prince Sado as King Yeongjo's only male descendant.King Yeongjo hoped for another son but instead bore only daughters.Uiso's father Crown Prince Sado had a severe mental illness and was often at odds with his father, King Yeongjo.Crown Prince Sado favoured the political party Soron, while King Yeongjo supported the ruling party Noron.Later King Yeongjo had his son, Crown Prince Sado, executed by locking him in a rice chest and starving him.On September 27, 1750 he was born Changkyong Kung Gyeongchun Jeon, in Hanseong.King Yeongjo expected great things from him.On May 13, 1751 King Yeongjo declared him the political heir.In November 1751, his aunt Lady Hyeonbin died, then soon after on 17 April 1752, Crown Prince Uiso died Tongmyongjeon.His grandfather King Yeongjo took the deaths hard and severed from psychological trauma for some time.He was given a state funeral of Joseons, from special instructions of King Yeongjo.His body was buried to the south of Mt. Ahnhyon(안현 鞍峴), Bugahyeon-dong in Hanseong.King Yeongjo named his grave Uiso grave and wrote the epitaphs, erecting a tombstone.In 1870, his grave name was Uiryong Park(의령원 懿寧園).In June 7, 1949, his grave was moved to Wondang in Goyang. [SEP] Knowledge 2: Sima Yu
Sima Yu (司馬遹) (278–300), courtesy name Xizu (熙祖),formally Crown Prince Minhuai (愍懷太子) was a Chinese crown prince during the Jin Dynasty (265-420).Sima Yu's father Sima Zhong was developmentally disabled, and before he, then crown prince, was to marry his wife Jia Nanfeng, his father Emperor Wu gave him one of his own concubines, Consort Xie Jiu (謝玖), so that Consort Xie could teach him how to have sexual relations.While Crown Princess Jia bore the crown prince four daughters, Sima Yu was his only son.When Sima Yu was four years old, there was a fire in the palace, and Emperor Wu walked up a tower to observe it.Sima Yu pulled him aside and said, "At night, when something unusual like this happens, we should take precautions.The light of the fire should not shine on the emperor."Emperor Wu was surprised by this perceptive observation by a child, and praised the young prince as very much like his own grandfather Sima Yi.This was part of the reason why Emperor Wu let Crown Prince Zhong remain his heir.In 289, he created Prince Yu the Prince of Guangling.After Emperor Wu died in 290, Crown Prince Zhong ascended the throne as Emperor Hui, and Prince Yu was created crown prince.As Crown Prince Yu grew in age, however, he lost some of the good reputation that he had as a child, as he disliked studying and spent much time on building projects and games.Empress Jia, who had constantly been jealous of Crown Prince Yu and Consort Xie, did not discourage this behavior, but in fact encouraged it to further damage Crown Prince Yu's reputation.When Crown Prince Yu's staff would try to correct his ways, he would not listen to them.He also would not listen to them with regard to their advice to maintain strong relations with Empress Jia's family members.Empress Jia's mother Guo Huai (郭槐) had constantly advised Empress Jia to treat Crown Prince Yuwell, as her own son, and she advocated marrying a daughter of Empress Jia's sister Jia Wu (賈午) to Crown Prince Yu.However, Empress Jia and Jia Wu opposed this, and instead married a daughter of the official Wang Yan (王衍) to Crown Prince Yu.(Wang had two daughters, but Empress Jia had Crown Prince Yu marry the less beautiful one and had her nephew Jia Mi marry the more beautiful one.)After Lady Guo's death, the relationship between Empress Jia and Crown Prince Yu quickly deteriorated, as Jia Wu and another associate of Empress Jia, Emperor Wu's concubine Consort Zhao Can (趙粲), provoked difficulties between them.Further, Crown Prince Yu and Jia Mi never liked each other, and Jia Mi, as a result, also advised Empress Jia to depose Crown Prince Yu.In 299, Empress Jia agreed and took action.When Crown Prince Yu was in the palace to make an official petition to have his ill son Sima Bin (司馬彬) created a prince, Empress Jia forced him to drink a large amount of wine and, once he was drunk, had him write out a statement in which he declared intention to murder the emperor and the empress and to take over as emperor.Empress Jia presented the writing to the officials and initially wanted Crown Prince Yu executed—but after some resistance, she only had him deposed and reduced to status of a commoner.Crown Prince Yu's mother Consort Xie was executed, as was his favorite concubine Consort Jiang Jun (蔣俊, Sima Bin's mother).Wang Yan divorced his daughter from the crown prince, who wrote an extant, lengthy letter to her explaining the incident through which Empress Jia framed him.In 300, under the advice of a prince she favored -- Sima Lun the Prince of Zhao, Emperor Wu's granduncle—Empress Jia decided to eliminate Crown Prince Yu as a threat.She sent assassins and had Crown Prince Yu assassinated.He was buried with honors due a prince—under the title of Prince of Guanling.Sima Lun's intent was, however, to use this assassination as excuse to overthrow Empress Jia, and he did so later that year.He had Crown Prince Yu reburied with the honors due a crown prince and had him given the posthumous name Minhuai.He also welcomed Crown Princess Wang back to the palace, along with Crown Prince Yu's surviving sons Sima Zang (司馬臧) (whom he had created crown prince) and Sima Shang (司馬尚).However, when Sima Lun then usurped the throne briefly in 301, Crown Prince Zang was killed.After Emperor Hui's restoration later that year, Sima Shang was created crown prince, but died in 302, extinguishing Crown Prince Yu's line.
Knowledge 1: Crown Prince Uiso
Crown Prince Uiso (hangul:의소세자 hanja:懿昭世子 ; 27 September 1750 - 17 April 1752) was a Crown Prince of Korea in the Joseon dynasty, the son of Crown Prince Sado and Lady Hyegyeong and was third in line of succession to the throne to King Yeongjo.He was the brother of King Jeongjo and elder half-brother of Prince Euneon, Prince Eunsin and Prince Eunjeon.His Korean name was Yi Jeong(hangul:이정 hanja:李琔) and his chinese name was Changheung(hangul:창흥 hanja:昌興).His mother, Lady Hyegyeong, of Pungsan was from a famous royal family line.His maternal grandfather was Hong Bong-han, whose younger brother was Hong In-han, a minister and later Prime Minister of that time.He was the first grandson of the 21st King Yeongjo of Joseon and his father, Crown Prince Sado, was the illegitimate second son of King Yeongjo.King Yeongjo's first son, Crown Prince Hyojang, died at the age of 10, leaving Crown Prince Sado as King Yeongjo's only male descendant.King Yeongjo hoped for another son but instead bore only daughters.Uiso's father Crown Prince Sado had a severe mental illness and was often at odds with his father, King Yeongjo.Crown Prince Sado favoured the political party Soron, while King Yeongjo supported the ruling party Noron.Later King Yeongjo had his son, Crown Prince Sado, executed by locking him in a rice chest and starving him.On September 27, 1750 he was born Changkyong Kung Gyeongchun Jeon, in Hanseong.King Yeongjo expected great things from him.On May 13, 1751 King Yeongjo declared him the political heir.In November 1751, his aunt Lady Hyeonbin died, then soon after on 17 April 1752, Crown Prince Uiso died Tongmyongjeon.His grandfather King Yeongjo took the deaths hard and severed from psychological trauma for some time.He was given a state funeral of Joseons, from special instructions of King Yeongjo.His body was buried to the south of Mt. Ahnhyon(안현 鞍峴), Bugahyeon-dong in Hanseong.King Yeongjo named his grave Uiso grave and wrote the epitaphs, erecting a tombstone.In 1870, his grave name was Uiryong Park(의령원 懿寧園).In June 7, 1949, his grave was moved to Wondang in Goyang. [SEP] Knowledge 2: Li Jiancheng
Li Jiancheng (589 – July 2, 626, formally Crown Prince Yin (literally, "the hidden crown prince"), nickname Pishamen (Sanskrit: Vaiśravaṇa), was the first crown prince of the Chinese Tang Dynasty.He was the oldest son of the founding emperor Emperor Gaozu (Li Yuan) and the crown prince after the founding of the dynasty in 618 CE.Li Jiancheng was murdered by his younger brother, Li Shimin, the Prince of Qin, in the Xuanwu Gate indident in 626.His sons were subsequently executed or excluded from the imperial clan.After Li Shimin took the throne, Li Jiancheng was posthumously stripped of his crown prince status and granted the title "Prince Yin of Xi" (息隐王).Later, he was buried with the ceremonies due to an imperial prince.In 642, Li Jiancheng's title of Crown Prince Yin (隐太子) was restored.

Answer: 6 August 1735