Literature Reference: 允，信也。——《说文解字》；昕，旦明，日将出也。——《说文解字》 'Yun' means trustworthiness, from 'Shuowen Jiezi'; 'Xin' refers to the dawn, the time when the sun is about to rise, also from 'Shuowen Jiezi'.
允: Promise, to permit. It metaphorically signifies honesty and trustworthiness, ensuring that every commitment is fulfilled.
昕: The moment when the sun is about to rise. When used in names, it often symbolizes brightness and wisdom.
Meaning: 'Yun' signifies trustworthiness and fairness, while 'Xin' symbolizes dawn and brightness, representing a future full of promise and integrity.