Why is the evaluation contrast between Chen Xingxu and Zhang Jingyi before and after falling in love at first sight so great?

Love at First Sight, starring Chen Xingxu and Zhang Jingyi, has a great contrast, because before the play was broadcast, the stills circulated on the Internet and in Reuters were very textured, and the looks and atmosphere of the actors and actresses were very similar to those of the Republic of China. However, after the broadcast, the plot was not good, and the filter was completely different from that of Reuters, which disappointed many netizens, so the evaluation was polarized.

The TV series Love at First Sight tells the love story between Tan Yulin, a young marshal in Tan Jiajun, and Mu, the eldest daughter of Shanghai No.1 chaebol. Judging from the title of the play, it feels very good. At the beginning of filming, Reuters was really beautiful. Chen Xingxu, the male host, is really handsome in Jong's uniform, and the young lady in Zhang Jingyi is also very beautiful. They seem to be a perfect match, and the occasional stills and Reuters give people a feeling of dreaming back to that era, so everyone's expectations are high.

However, after the play was broadcast, everyone was disappointed. The dermabrasion filter makes people feel that the quality of the play has dropped a lot. Many plots in the play make people feel illogical, which makes people frown when they meet for the first time. I can only say how much I expected before and how disappointed I was afterwards.