Danzhou read it twice.
The pronunciation of Danzhou was [dàn], and the pronunciation of Danzhou was [dānzhōu].
The Danzhou in Qingyu Nian did not refer to the Danzhou in Hainan. The Danzhou in Qingyu referred to the Danzhou in Jiangsu and Zhejiang provinces, and had nothing to do with the Danzhou in Hainan. Therefore, the Danzhou of Qing Yu Nian was not Danzhou of Hainan.
The Danzhou in Qingyu Nian referred to Danzhou City in Hainan Province. Danzhou City was located in the northwest of Hainan Province. It was a prefecture-level city in Hainan Province. Danzhou City was the economic, transportation, communication, and cultural center of the western part of Hainan Province. It was also a tourist destination. The Danzhou in Qingyu years did not refer to the real Danzhou, but to the Danzhou in Jiangsu and Zhejiang provinces.
The correct pronunciation of Zhanzhou was zhānzhōu, while the correct pronunciation of Danzhou was dānzhōu.
Danzhou was pronounced as daam1 in Cantonese.