冬天不适合想太多
[dōng tiān bù shì hé xiăng tài duō]
This translates into 'Winter is not the season to overthink.' There's a notion of sadness here but also some relief, like trying to find ways of solace within oneself. Winter itself brings feelings of being cold and gloomy in China; using the season as the metaphor makes a perfect fit, showing how they are dealing with certain troubles at this moment.