There are a lot of factions in Pandaria and getting reputation with them has become an important part of the game. More than it has been in the previous extensions.
Now, since grinding reputation can take a long time, Blizzard has thought of it and you can do different things to boost your reputation.
One of them is to kill one elite mob. He is called Scritch and he is a level 88 Hozen elite, that you can find in one of the four caves a bit south of the center of Kun-Lai Summit (around 44.8 65.2. and 47.2 63.0).
When you kill him, he might drop something called the Hozen Peace Pipe. It has about a 10% drop rate.
Now, this pipe, when used will increase reputation with the denizens of Pandaria by 1,000 points. The pipe has a 7 days cool down.
That means it will give you 1000 reputation with all the new Pandaren factions other than the Black Prince: The Anglers, The August Celestials, Golden Lotus, The Klaxxi, The Lorewalkers, Order of the Cloud Serpent, Shado-Pan, and The Tillers (it is affected by +rep gains (human, guilded) but isn’t affected by battle standard).
The pipe is bound on equip so you might even find it in AH.
All right, 1,000 points isn’t always a lot, even though it helps.
But actually, this “rare” isn’t that rare. He has a respawn time of about one hour and since the peace pipe isn’t unique equipped, you can have as many as you wish or as you have patience to grind to.
You can just have one character near the monkey and log on each 55 minutes or so to kill him, then switch back to whatever you are doing with whatever char you are playing with.
It definitely can be worth it.