(The combos are listed as follows: 1st item listed goes in the furnace, Last item listed is the statue to active after the levers are activated, the items in the middle are in the order to be pulled... i think....it might not matter this is just how it worked for me.)

Configuration of the:

Snake- Iron, conductor, smoke, cauldron, Tiger

Tiger- Iron, conductor, cogs, Dragon

Dragon- Sulfur, cogs, cauldron, Tiger

Rabbit- Cow, conductor, smoke, cogs, Dragon

Horse- Cow, conductor, smoke, water, cauldron, Tiger

Ox- Sulfur*, water, smoke, Dragon

* You only have 1 vial of sulfur water at a time. Use the 1st vial in one of the first three configs. you complete. After you complete 3 or 4 configs Kang will talk to you about getting a reward from Lord Lao. Go back to the flyer and get the reward. When you return from the mission tell Kang you want to return to the furnaces to complete the rest of the configs. You should receive a new vial of sulfur before you return again. After you have finished freeing Lord Lao you will get. Configuration of Rat and Goat. You can only choose one because the furnace will breaks after you use it with the Eyes of the Void after the 1st config.

Rat-(Stren gth of Bull increases Martial attacks) Eyes, smoke, water, cogs cauldron, Dragon

Goat-( Harmony & Balance Body +3 Mind +3 Spirit +3) Eyes, conductor, water, cogs, Tiger