Why is the weather so bad in Xiamen recently?

Recently, a cold current in the northern part of the Eurasian continent went straight to Xiamen, which is close to the ocean, and the specific heat capacity of the ocean is relatively large and warm. Cold and warm air currents meet in Xiamen, so it always rains. At the same time, the cold current will be cold, so Xiamen becomes cold. If the two win (the cold current will win), the weather in Xiamen will be better, but it will be cold

If you need help, please accept it.