一: To signify the beginning, to embody the entirety, and to represent the pinnacle of excellence and perfection.
盛: Prosperous and flourishing. In personal names, it often signifies thriving success in one's career, depicting a scene of vigorous growth and swift triumph, a character that favors the development of one's professional endeavors.
Meaning: Yisheng signifies uniqueness and prosperity, symbolizing success and brilliance.