I am a cashier at present, and my advice to you is that it is always good to have one more skill, but if you really don't like it, you can refuse it. Regarding the question of who will bear the training fee, the Labor Law stipulates that:

1. Training summarized in the Labor Contract Law refers to specialized training for cultivating and improving employees' professional skills. There are special training vouchers and special training periods. Whether to voluntarily participate in such skills training is up to employees to choose whether they need such training time and opportunities. If the special training expenses are borne by the employer, the employee will be responsible for providing services during the agreed service period of the training.

Article 22 of the Labor Contract Law of People's Republic of China (PRC) * * * Where an employer provides special training fees for its employees and provides them with professional and technical training, it may conclude an agreement with the employees to stipulate the service period.

If the company bears the training fee, it has the right to agree on the service period with you. If you leave your job during the service period, you need to bear liquidated damages. In fact, if you teach yourself, you don't have to report to class. There are many free training courses online.