'Dong Yi (동이 / 同伊)' is the old name of Choi Suk-bin : The Royal Noble Consort Sook of the Choi clan.
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'Dong Yi (동이 / 同伊)' is the old name of Royal Noble Consort Sook of the Choi clan or Choi Sook-bin. She is a concubine of King Suk-jong and King Yeong-jo of Joseon.
'Dong Yi' was a water maid in the palace, under Queen Inhyeon. One night, she was praying in her chamber for Inhyeon's wellness when Sukjong, who was crossing outside after a trip outside of the palace, heard her and, moved by her kindness (Sukjong was having his regrets at that time), made her his concubine. She became suk-bin after the birth of a son in 1694. Besides this son, she had 2 other sons (both disputed).
She was given the posthumous title "Lady Hwagyeong, Royal Noble Consort Sook of the Choi clan" (화경숙빈최씨 / 和瓊淑嬪崔氏).
'Dong Yi' MBC Drama : Set during the reign of King Suk-jong in the Joseon dynasty, the story focuses on Dong Yi, a water maid who gains the trust of Queen In-hyeon and later the favour of the king when he is moved by her prayers for the health of the Queen during the court disputes caused by Jang Hee-bin. Dong-yi becomes a concubine with the rank of sook-bin and bears a son who will later become the 21st king of Joseon, Yeong-jo.
The Leader cast in 'Dong Yi' : Ji Jin-hee as King Suk-jong, Park Ha-sun as Queen In-hyeon, Lee So-yeon as Jang Hee-bin / Jang Ok-jung, Han Hyo-joo as Choi Dong-yi, later Choi Sook-bin.
The photo below this article capture from "Dong Yi" Episode 30.