Xi' an Food and Beverage Management Co., Ltd. is engaged in snack training. In the first phase, many people studied keep teaching sb until he/she fully comprehends it until they learned it. It was very professional and patient. Xi 'an Food and Beverage Management Co., Ltd. is engaged in snack training. Many people studied in the first phase, keep teaching sb until he/she fully comprehends it, who was very professional and patient until he learned it.