Step 3: To burn kiln from the burning door (about from 20 to 25 days)
Step 4: The smoke in kiln will come out by four chimney around kiln
Step 5: We can know wood became charcoal or not by smoke of kiln
Step 6: When wood became charcoal already, we will close the burning door and four chimney of kiln
Step 7: The kiln will cool down automatically after from 7 to 10 days, then we will take charcoal out and charcoal will be transported to store where we will pack