海: The vast ocean symbolizes boundless expansiveness. In the context of a name, it conveys aspirations of grand ambition, profound knowledge, and a broad, inclusive heart.
赛: The concept of competition and the determination of victory or defeat.
Meaning: The name 'Hai Sai' is melodious and profound. 'Hai' symbolizes vastness and inclusiveness, while 'Sai' embodies competitiveness and a spirit of advancement.