He is absolutely timid and spineless. As a fellow fan of Revenged Love and To My Shore, I found him utterly infuriating…
If u haven't read the novel I'd recommend u read it. Imo the novel provide more details so you'll get a better picture/understanding Yi Cheng's mindset in this relationship.
BTW, if u haven't seen Unknown and Double Mints, I'd recommend u watch them 😊