August Celestials has 4 total daily quest hubs - Temple of the Jade Serpent, Temple of the White Tiger, Niuzao Temple and Cradle of Chi-Ji. If you visit their representative at your faction's Shrine in the Vale, he will tell you which of the first three is an active hub for that day. What usually doesn't get mentioned is that the Cradle of Chi-Ji hub is active every day. If you aren't doing 2 hubs for August Celestials per day, you're losing out on rep.
Just get prepared for a lot of mail spam from the Chi-Ji NPCs. There's a little story going on and while the mail you get doesn't seem to make a lot of sense at first, it's part of the story.