What are the nationalities of Peter Ho and Anglenala in Welcome to Beijing? Why are there them?

Peter Ho is from China, but he has American citizenship. Anglenala is from South Korea. The reason why she came to sing may be that she is a Korean star who has been developing in China for the longest time and a cultural ambassador for the establishment of diplomatic relations between China and South Korea. Besides, during her March into China, she also made some contributions to the culture of China and South Korea. She also supported the Beijing Olympic Games in China, so I think it would be better to invite her to sing Welcome to Beijing.