First, The Longest Promise is different from previous fairy tale dramas in that it abuses the male protagonist, not the female protagonist. Shi Ying has a deep affection for the heroine and always thinks of her. In the end, he went through hell and narrow escape to be with the heroine. He was always honest and sincere, and was killed by the heroine twice.
Moreover, the female characters in it are all very good, focused on their careers, motivated, and women can inherit the throne. For example, the heroine Zhu Yan is the heir to the throne of the Red Clan, Bai Xuelu finally becomes the White King, and Qinggang finally gives up the position of Qing Wang and chooses to be with Bai Xuelu.

Secondly, the purpose of the play is very high. There is love, but also the righteousness of family and country! Although Shi Ying died at the hands of the heroine, he actually sealed his soul with his body, died to save the common people, served the country and the people, and was a great chivalrous man. Shi Ying's self-sacrifice bought Kong Sang 70 years of peace.
Moreover, Shi Ying used his own death to teach the heroine what it means to be a Dharma student and what it means to take responsibility. In the face of great right and wrong, the love between men and woman can be put aside!

Thirdly, Xiao Zhan's character is very stunning. I have never seen him like this before. A tall and straight figure, and an extraordinary demeanor.

You will regret it if you don't watch it. The special effects, costumes, and scenery of the drama are also very good!