- 若有所思 ruòyǒusuǒsī lost in thoughtlooking pensive or thoughtful, as if thinking about something deeply
- 日有所思，夜有所梦 rìyǒusuǒsīyèyǒusuǒmèng what you think about by day you dream of by nightProverb meaning that what one thinks about or worries about constantly during the day will appear in one's dreams at night.