Is Weihai upstream or downstream in Japan?

Weihai is a municipality under the jurisdiction of Shandong Province, located in the east of China, at the eastern end of Shandong Peninsula, and bordering the Yellow Sea on three sides. Weihai is neither upstream nor downstream of Japan.

China is located on the bisector of China, facing the Korean Peninsula and the Japanese archipelago across the sea, and is the nearest city to South Korea. Weihai has the longest coastline in China and is a famous port city and coastal tourist city.