No, according to relevant information, Qinggang Town in Yuhuan County is not a sea. Yuhuan county refers to Yuhuan. Yuhuan is a county-level city under the jurisdiction of Zhejiang Province and is managed by Taizhou City. It is located in the southeast coast of Zhejiang, the middle section of China golden coastline, the south wing of Yangtze River Delta economic circle, bordering the East China Sea in the east, Dongtouyang in Dongtou District of Wenzhou in the south, Yueqing in the west and northwest across Yueqing Bay, and Wenling in the north and northeast.