HSK 6
Gōngsī lǐngdǎo huàn jiè hěn zhèngcháng, rénshìyǒudàixiè ma.
Leadership rotation in a company is perfectly normal - human affairs do succeed one another.
HSK 7-9
Rénshìyǒudàixiè, wǎngláichénggǔjīn, lǎoyībèi tuì xiàlái shì zìrán guīlǜ.
'Human affairs succeed one another, comings and goings make past and present' - the older generation stepping down is a natural law.