I'm not sure, but as far as I know, most factory Tours are free. They are sponsored by the company providing the tour.

不清楚，但是大多数这种参观都是免费的，我接待我们的公司安排。

youdao

Guangzhou Baiyun District Natural Cosmetics factory sincerely welcome visitors from all walks of life, study Tours, business negotiations.

广州市白云区自然日用化妆品厂热诚欢迎各界前来参观、考察、洽谈业务。

youdao

Guangzhou Baiyun District Natural Cosmetics factory sincerely welcome visitors from all walks of life, study Tours, business negotiations.

广州市白云区自然日用化妆品厂热诚欢迎各界前来参观、考察、洽谈业务。

youdao