This question involves history, politics, culture, and human nature. I can't give a definite answer, but I can provide some possible explanations: Political asylum: In Chinese history, many emperors and politicians were captured or exiled to other countries, but they often used their power and influence to seek political asylum. Under such circumstances, they might choose to stay in other countries to continue to serve as officials or hold power rather than just be imprisoned or exiled. 2. Birth policy: During the Jin Dynasty, due to the preferences and policies of the rulers, some women were forced to marry and were forced to give birth. In this case, Emperor Huizong of Song might choose to have more children in order to continue his bloodline and power in the Jin Dynasty. 3 personal desires: Song Huizong may also have some personal desires such as wanting to maintain his family and status or wanting to use his power and resources to strive for better living conditions and opportunities for himself and his children. It should be noted that the above are only some possible explanations. The specific details and background still need to be analyzed and discussed according to the specific plot of the novel.