November-December is usually winter in the northern hemisphere, and the weather can vary depending on the region. In China, northern areas can be very cold with snow, while southern areas are relatively mild. When it comes to travel, it depends on your chosen destination and personal preference.
If you want to go skiing or experience the winter snow scene, some northern cities such as Harbin, Zhangjiakou and other places are a good choice. But if you prefer a warm seaside or hot spring vacation, then places like Hainan Island or Yunnan may be more suitable.
In general, if you like the cold climate in winter, or have specific interests in winter activities, traveling during this time is feasible. But if you don’t like the cold, or plan to go somewhere that doesn’t offer winter-specific activities, you may want to consider traveling at another time. It is recommended to check the weather forecast of your destination in advance so that you can prepare accordingly.