The fact that Hong Kong judges wear wigs has little to do with the illness of the king of England 3 years ago. Because Hong Kong was deeply influenced by Anglo-American culture, and it is a tradition of Anglo-American legal system that judges wear wigs. As for this tradition, people have many explanations so far:
First, in medieval England, judicial officers had to face all kinds of difficult lawsuits all day. Because they used their brains too much, their hair fell off quickly. In order to cover up the fact that their hair was getting bald, they wore wigs to maintain a good image in public. After a long time, it gradually became a tradition.
second, judges and lawyers put on wigs, and the whole person has a new look and looks solemn. According to some data, in the 12th century, many upper-class people liked to wear wigs as a formal dress when attending formal occasions. Patents that later became judges and lawyers have also been used in court.
Third, there are some religious explanations that wearing a wig can get God's blessing and so on.
Fourth, it is said that in ancient times, because of poor sanitary conditions, many people shaved their short hair and then covered it with wigs, and this custom was also preserved.
In short, there are many different explanations about the origin of wigs, and there is no unified conclusion at present, because the British are conservative and traditional, and this tradition has been preserved. As a former colony of Britain, the British judicial system has left a deep imprint in Hong Kong, so lawyers in Hong Kong also need to wear wigs when they appear in court.
In addition, lawyers only need to wear wigs when they appear in court. Moreover, the price of these wigs is said to be very expensive, and some wigs in Britain even reach thousands of pounds.