花無百日紅 [－无－－红]

Jyutping faa1 mou4 baak3 jat6 hung4
Pinyin huā wú bǎi rì hóng

Definitions (CC-CEDICT)
  1. No flower can bloom for a hundred days.
  2. Good times do not last long. (idiom)
Definitions (粵典–words.hk)
  1. 語句
    比喻​人世​變化​無常​，​唔​可能​永遠​都​係​順境​；​有時​同上​一句​「​人​無​千日​好​」​連用
    no flower can bloom for a hundred days; an ideal state cannot last long; good times do not last long