Can Muslims eat dumplings on the winter solstice?

No such thing. The Hui people can eat dumplings, but not filled with pork. Most of the winter solstice in the north to eat dumplings, this is the custom. The winter solstice festival is one of the traditional Han Chinese festivals, originating in the Han Dynasty, flourishing in the Tang and Song dynasties, and continuing to this day.

The winter solstice is commonly known as the "winter festival", "long solstice festival", "sub year", etc., as early as two thousand five hundred years ago in the Spring and Autumn Period, China has been used to observe the sun.

Extended information:

Early in the Spring and Autumn period of more than 2,500 years ago, China has been using the earth gui to observe the sun to determine the winter solstice this festival, the time in the Gregorian calendar each year around the around December 22nd. Ancient people on the winter solstice is: the yin pole of the arrival, Yang Qi began to grow, the day south to the day short of the arrival of the sun, the shadow of the long of the arrival, so said "winter solstice".

The winter solstice this day the sun directly south of the Tropic of Cancer, the sunlight on the northern hemisphere is the most tilted, the shortest daytime hours, the longest night time. After this day, the sun's rays gradually move northward from the Tropic of Capricorn, and the day becomes longer day by day. The winter solstice is also a sign of the coldest time of the winter, which is often referred to as "into the nine", China's folk traditionally have "cold in three nine, hot in three volts".