万恶淫为首百善孝为先
[wàn è yín wéi shŏu băi shàn xiào wéi xiān]
Of All Evils Lewdness is the First and Of All Virtues Filial Piety is Foremost comes from traditional Chinese value concepts regarding behavior criteria: emphasizing moderation and propriety in conduct, respecting family and elders above all else.