Is Nikun's mother from China?

Nichkhun's mother's parents are from China, and they both went to Thailand when they were very young. They immigrated to Thailand when they were about four or five years old. At that time, they were too young to speak Thai and Chinese for a long time, so I don't think so. His mother grew up in Thailand and only knows a little Chinese. I don't know why Nichkhun's encyclopedia says that his mother is from Taiwan Province province, China.