Who is Tzu-hsia from The Analects and what is their importance?

Tzu-hsia is a disciple of Confucius who is credited by tradition with a major role in transmitting the Confucian classics. He is devoted to book learning. Six of the eleven sayings attributed to Tzu-hsia are about learning. He has a reputation for learning and is the author of a Preface to the Odes. Virtuous conduct, however, is a greater goal than book learning.