I see this book pop up on Chinese romance novel forums a lot, so I looked it up. The full title is often translated as 'Immersed in His Silent Love' or something close, and I think it's a webnovel originally. The main setup, from what I gathered, involves a male lead who's wealthy and powerful in that classic CEO style but has some kind of disability—maybe he's mute or selectively mute? The core plot seems to revolve around a contractual or arranged marriage with the female lead, where his inability or refusal to speak becomes a huge point of misunderstanding and tension.
She might enter the marriage reluctantly or with some other motive, and his silence is initially mistaken for coldness, disdain, or even cruelty. The 'silent love' part comes from the idea that his affection and devotion are expressed entirely through actions, not words. He protects her, provides for her, and solves problems from the shadows, but she doesn't see it because she's waiting for verbal confirmation or sweet nothings. A lot of the story's conflict stems from her misinterpreting his actions due to the communication barrier.
I haven't read it all, but these kinds of plots often have a big 'realization' moment where the female lead finally pieces together all the things he's secretly done for her, leading to a lot of angst and then reconciliation. There's probably a subplot about scheming relatives or business rivals that he quietly neutralizes to keep her safe. The appeal seems to be in the yearning and the dramatic irony—the reader knows the depth of his feelings long before the heroine does, which creates a specific kind of emotional pull. It's definitely a premise that leans hard into the 'cold on the outside, burning inside' trope for the male lead.