蒼蠅不叮無縫蛋

1. • lit. flies do not attack an intact egg (idiom)
2. • fig. no smoke without a fire

Character by character

• 蒼(cāng)surname Cang
• 蠅(ying)fly
• 不(bù)no
• 叮(dīng)sting or bite
• 無(wú)not to have
• 縫(fèng)seam
• 蛋(dàn)egg