Challenge Hawkmaster Nurong, and then defeat him in combat at Shado-Pan Garrison in Townlong Steppes.
Challenge Hawkmaster Nurong
Defeat Hawkmaster Nurong
You've really been building up respect with the Shado-Pan, <name>.
Nurong's interested in trying out his skills against you.
The good news is, if you win, I'll allow him to go with you on your missions.
The bad news is, I really don't think you'll win.