Well, I haven't really read a 'Sweet Escape' Chinese novel directly named like that. But some popular Chinese novels often have themes of escaping from difficulties or finding a new life, like 'A Record of Mortal's Cultivation to Immortality' which is about a character escaping from his ordinary fate and seeking immortality. It might not be exactly a 'Sweet Escape' but has similar elements.
To find a 'Sweet Escape' Chinese novel, you could also ask in some Chinese - language reading groups or forums. People there are more likely to be familiar with such novels. They might recommend some novels that involve characters getting away from a tough situation and into a sweeter or more ideal world, perhaps in a historical or fantasy setting.