What's the weather like in the northeast?

I come from the northeast, and now the whole northeast is cold, but the climate in the three northeastern provinces is also very different. It's already very cold in Heilongjiang, so it's necessary to wear cotton-padded clothes. In Liaoning Province, which is located in the south-east of China, especially in the coastal cities of Bohai Sea in Liaoning Province, the temperature is higher than in previous years. For example, in Yingkou, where I live, I only need a sweater and a coat at present, which is not cold, and sometimes it will be 15.