A lot of Chinese people do not like the number "4", as the pronunciation of "4" in Chinese is similar to the pronunciation of the character which means "dead".They much prefer the number "8",as the pronuncication of "8" in Chinese is similar to the pronunciation of "fa"(getting rich).However, many others do not care.
sì sǐ
四 （4）→ 死 （dead）
bā fā
八 (8) → 发 （getting rich）