宝刀不老

1. • lit. a good sword always remains sharp (idiom)
2. • fig. (of one's skills etc) to be as good as ever
3. • the old man still has it

Character by character

• 宝(bǎo)jewel
• 刀(dāo)surname Dao
• 不(bù)no
• 老(lǎo)prefix used before the surname of a person or a numeral indicating the order of birth of the children in a family or to indicate affection or familiarity