It means that an emperor of Chinese dynasty and monarchs of neighboring countries established the relations between lord and vassal but it does not mean that the neighboring countries would be completely controlled by the Chinese dynasty.
それは中国王朝の皇帝と周辺諸国の君主とが君臣関係を結ぶことを意味するが、それにより中国王朝の支配が周辺諸国全域に貫徹するということではない。