In French, the wine cellar is also called a 'chai'. This term is used to refer to the places where bottles of wine or alcohol are stored. But first and foremost, the chai is where the winemaking takes place, which involves turning the grape musts into wine. The chai master is in charge of supervising the making of the wine, from the arrival of the grapes to the bottling. He works in close collaboration with the winemaker and monitors the harvest at his side.