Complex sentence: According to this source, in 1282 Kublai Khan demanded Haru to submit to China's suzerainty, which was responded graciously by sending tribute to Yuan's court in 1295.
Split into simpler sentences: According to this source, in 1282 Kublai Khan demanded that Haru to submit to China's suzerainty. Haru responded graciously by sending tribute to Yuan's court in 1295.