First, refer to different
1, Xin: Spread the fragrance far away.
2, Xin: happy, like it.
Second, the sources are different.
1, Xin: Shuo Wen by Xu Shen in the Eastern Han Dynasty: Xin, Xiang Yuan. (Xin, the smell in the distance)
2. Xin: Xu Shen's Shuo Wen in the Eastern Han Dynasty: Xin, laugh and be happy. (Xin, just laughing)
Third, the etymology is different
1, Xin: sound and shape, from fragrance, sound, sound, writing "qi", original meaning fragrance, far transmission.
2, Xin: sound, debt, golden sound, real words with Xin, the original meaning is happy.