Imperial Noble Consort Dunsu
Imperial Noble Consort Dunsu( died 27 December 1725), of the Han Chinese Bordered Yellow Banner Nian clan, was a consort of the Yongzheng Emperor.
Consort Jin
Imperial Noble Consort Wenjing( 6 October 1873 – 24 September 1924), of the Manchu Bordered Red Banner Tatara clan, was a consort of the Guangxu Emperor.
She was two years his junior.
Imperial Noble Consort Zhemin
Imperial Noble Consort Zhemin (died 20 August 1735), of the Manchu Plain Yellow Banner Fuca clan, was a consort of the Qianlong Emperor.
Yonghuang
Yonghuang( Manchu:" Yong huwang"; 5 July 1728 – 21 April 1750) was an imperial prince of the Manchu- led Qing dynasty in China.
Born in the Aisin Gioro clan, he was the eldest son of the Qianlong Emperor.
His mother was Imperial Noble Consort Zhemin.
Imperial Noble Consort Xianzhe
Imperial Noble Consort Xianzhe( 2 July 1856 – 3 February 1932), of the Manchu Bordered Blue Banner Hešeri clan, was a consort of the Tongzhi Emperor.
Qianlong Emperor
The Qianlong Emperor (25 September 1711 – 7 February 1799) was the sixth Emperor of the Qing dynasty, and the fourth Qing emperor to rule over China proper, reigned from 1735 to 1796.
Born Hongli, the fourth son of the Yongzheng Emperor, he reigned officially from 11 October 1735 to 8 February 1796.
On 8 February, he abdicated in favour of his son, the Jiaqing Emperor—a filial act in order not to reign longer than his grandfather, the illustrious Kangxi Emperor.
Despite his retirement, however, he retained ultimate power as the Retired Emperor until his death in 1799; he thus was one of the longest-reigning "de facto" rulers in the history of the world, and dying at the age of 87, one of the longest-lived.
As a capable and cultured ruler inheriting a thriving empire, during his long reign the Qing Empire reached its most splendid and prosperous era, boasting a large population and economy.
As a military leader, he led military campaigns expanding the dynastic territory to the largest extent by conquering and sometimes destroying Central Asian kingdoms.
This turned around in his late years: the Qing empire began to decline with corruption and wastefulness in his court and a stagnating civil society.
A British valet who accompanied his diplomat master to the Qing court in 1793 described the emperor:
The Emperor is about five feet ten inches in height, and of a slender but elegant form; his complexion is comparatively fair, though his eyes are dark; his nose is rather aquiline, and the whole of his countenance presents a perfect regularity of feature, which, by no means, announce the great age he is said to have attained; his person is attracting, and his deportment accompanied by an affability, which, without lessening the dignity of the prince, evinces the amiable character of the man.
His dress consisted of a loose robe of yellow silk, a cap of black velvet with a red ball on the top, and adorned with a peacock's feather, which is the peculiar distinction of mandarins of the first class.
He wore silk boots embroidered with gold, and a sash of blue girded his waist.
Imperial Noble Consort Huixian
Imperial Noble Consort Huixian( 1711 – 25 February 1745), of the Manchu Bordered Yellow Banner Gaogiya clan, was a consort of the Qianlong Emperor.
Imperial Noble Consort Zhuangshun
Imperial Noble Consort Zhuangshun( 29 November 1822 – 13 December 1866), of the Manchu Uya clan, was a consort of the Daoguang Emperor.
She was 40 years his junior.
Imperial Noble Consort Quehui
Imperial Noble Consort Quehui( 1668 – 24 April 1743), of the Manchu Bordered Yellow Banner Tunggiya clan, was a consort of the Kangxi Emperor.
She was 14 years his junior.
Imperial Noble Consort Dunhui
Imperial Noble Consort Dunhui( 6 September 1856 – 18 May 1933), of the Manchu Bordered Blue Banner Sirin Gioro clan, was a consort of the Tongzhi Emperor.

Question: What is the date of death of Imperial Noble Consort Zhemin's husband?
Answer: 7 February 1799