qnli question: Who were Wang Jiawei and Nyima Gyaincain? sentence: But most scholars outside China, such as Turrell V. Wylie, Melvin C. Goldstein, and Helmut Hoffman, say that the relationship was one of suzerainty, that Ming titles were only nominal, that Tibet remained an independent region outside Ming control, and that it simply paid tribute until the Jiajing Emperor (1521–1566), who ceased relations with Tibet.