Official website is made in China and South Korea, so China is made in China and Korea is made in Korea?

Produce wherever the place of origin is written.

As for the delivery problem you asked, it has nothing to do with production and belongs to logistics. Judging from the introduction, it should be that all the goods sent by China Department to Dalu are sent from Shanghai warehouse, which may have domestic production, and some Korean production will be shipped to Shanghai for preservation.