Walkthrough ( video )
2. Do Scholar Wu a favor and find Pharmacist Mu Mu for the Azure Pill, which is made from 1 Ratling Eye, 3 Ratling Meat and 2 Herb Packs.
3. Kill the Fire Rat and you will have a chance to get 1 Ratling Eye and 3 Ratling Meat in your inventory. Then Bian Qing will give you 2 Herb Packs.
4. Give all the materials to Pharmacist Mu Mu and he will return you the Azure Pill.
5. Bring the Azure Pill to Scholar Wu and claim a reward from Task Master Chang in Job Center.