[Tit for tat] How to complete this task?

1. First go to the Thunder Wine Brewery and find the owner of the hotel, Belm.

2. Buy a piece of Thunder Ale from the innkeeper Belm. It costs 50 copper coins.

3. Then go to the room with "Cooking Trainer" and "DZ Trainer" inside. There is a red carpet in the innermost corner. Enter the basement from here.

4. Find the NPC with a blue question mark on his head - Gavin Leijiu. And gave him the Thunder Ale he just bought.

5. NPCs who receive Thunder Ale will leave this place. But will be back in a little while.

6. At this point we need to open the clickable wine barrel. You can complete the "Tit for Tat" mission.

Extended information

World of Warcraft has designed 13 races for players to choose from. That is, night elves, humans, orcs, tauren, dwarves, undead, trolls, gnomes (original version); blood elves, draenei (The Burning Crusade TBC); werewolves, goblins (Catacion CTM); pandaren (Panda) Mystery of Man MOP);

Void Elves, Lightforged Draenei, Dark Iron Dwarves, Nightborne, Highmountain Tauren, Zandalari Trolls, Mag'har Orcs, Kul Tiras People (Battle for Azeroth). Each race has its own distinctive characteristics, including its own story background, cities, abilities and talents, as well as different transportation methods and mounts. Players can choose to join the Alliance or the Horde.

Baidu Encyclopedia - World of Warcraft