Is it reasonable for Xi 'an North Station to recruit flight attendants to charge for clothing?

Unreasonable. According to the Labor Protection Law of People's Republic of China (PRC), enterprises or employers must provide necessary labor protection articles for workers in accordance with the labor safety regulations of the industry, and the expenses shall be paid out of the labor safety fees, and shall not be purchased by the workers themselves. Other work-related clothes are also purchased at the expense of the employer, and the expenses shall not be imposed on the workers themselves or in disguised form.