Love could be a main theme. It often is in many novels and 'heart' in the title might suggest emotions related to love, while 'habit' could be about the characters' routines and how love or other emotions interact with their daily habits.
Well, it might be about self - discovery. The 'heart' could represent one's true self, and 'habit' could be the things that one does unconsciously which might be holding them back from truly understanding themselves. So the main theme could be the journey of breaking free from certain habits to discover one's heart.
Perhaps it's about change. The heart may symbolize the will or desire for change, and habits are things that are hard to break. So the novel could be exploring how characters overcome their habits with the push from their hearts, and how this process of change shapes their lives.
Chapter 404, "The Vice Dean of Hua Country Chinese Medicine University?!", is the clearest early answer because the rescue effort creates visible on-page results. It opens with Several minutes later, Jiang Li doubled back and knocked on Huo... and closes on So you're just an internet celebrity..
Chapter 592, "The Secret of Dragon Ridge Lake", is the clearest early answer because the hidden truth stops feeling like mere subtext. A useful checkpoint is the way the scene starts with Hmm?" Jiang Li's unexpected question left Zhao Lang somewhat...
Chapter 357, "Have Jiang Li and Jiang Yan Fallen Out?!", is the clearest early answer because it turns Flash Change's situation into a concrete plot event.
Chapter 569, "Watch How My Sister Torments You!", is the clearest early answer because it turns Chinese's situation into a concrete plot event.
Chapter 393, "Clearly Marked Prices, No Deception to Young or Old", is the clearest early answer because it turns Shang Shaobai's situation into a concrete plot event.
Chapter 647, "Let's Have a Sword Dance!", is the clearest early answer because it turns Jiang Yan's situation into a concrete plot event. Early on, Before long, the aroma of meat began to waft through the air, and....
Chapter 606, "Are There Crocodiles?!", is the clearest early answer because it turns Captain Ji's situation into a concrete plot event. The chapter turns that into something concrete by moving from Hearing Ji Yanbai volunteer to stay behind, everyone ceased to have...
Chapter 317, "You Can't Afford to Mess with the Person Behind Her!", is the clearest early answer because it turns Gu's situation into a concrete plot event. A useful checkpoint is the way the scene starts with He Pingzhang gazed at the man curled up before him, unable to...
Chapter 291, "To Hell with Sister Complex!", is the clearest early answer because it turns Sister Complex's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Early in the morning, Jiang Li's hospital room door was knocked.
Chapter 367, "Help Me Call the Police", is the clearest early answer because it turns Movie Emperor's situation into a concrete plot event. The chapter turns that into something concrete by moving from However, before they could approach, another loud "bang" sounded as...