✔ 最佳答案
You use the world "Factory" which should be large in scale.
Even in Hong Kong which is a developed city, we do not have such drying factories available. You cannot expect finding one in Guangzhou since the demand from citizens would be much less than Hong Kong ( when you consider the type of industry and the main occupations of people there ).
"Zoo" website has no use for it only brings you to the "Zoo"!!!
Hope I can help you.
參考: Mathematics Teacher Mr. Ip