博闻强识 (bó wén qiáng zhì): Having extensive knowledge and a powerful memory — Meaning & Stroke Order

To become a person of extensive knowledge and strong memory, you must read more and practice memorization diligently.

He is erudite and retentive, able to recite the entire Analects.

This historian is erudite and retentive, knowing ancient texts like the back of his hand.

He is erudite and retentive, quoting classics in debates so that no one can match him.