<Chinese TV Series NOW> ”Rakuyugen” 2 EP4, Liu Chengfeng gives Cui Lin medicine to make her sick = Synopsis / Spoilers

※This article contains spoilers. In the Chinese TV series "Le You Yuan" 2 EP4, Liu Chengfeng is shown giving medicine to Cui Lin to make her sick.
Sun Jing (Sun Sei) lets Lady Wei escape and takes part in the Battle of Gao Pass. The combined forces of Li Yi (Li Gyoku) and Cui Lin (Cui Lin) begin to attack Gao Pass, and Sun Jing takes Taisun hostage, but Cui Lin is a fake Taisun.
He revealed that he had brought his grandson, upsetting Sun Jing's soldiers. Li Yi tried to save Taisun at the cost of his own life, but was stopped by Cui Lin. In the midst of the melee, General Han rescued Taisun.
Sun Jing committed suicide, and the rebellion came to an end. However, the real Grand Master was missing, and Li Yi blamed Cui Lin. Cui Lin and Li Yi gradually became more and more arguing, and Li Yi considered putting the Grand Master on the throne.
However, Choi Rim advises Li Yi that it is too early. Meanwhile, Yu Seung-bong tempts Li Ho and plots to assassinate Li Yi. Meanwhile, Li Yi and Choi Rim are falling out.
However, Taozi comes up with a plan to give medicine to Li Yi. However, Li Yi notices Taozi's plan and gives him the medicine instead. Yu Seung-bong gives Kesuk's medicine to make Cui Lin sick.
Choi Rim, who had been tricked into eating the food, became seriously ill, but Li Yi assumed that she was faking it and did not visit her.