Do both Rongcheng, Shandong and Dongsheng District border the Yellow Sea?
no
Dongsheng District
Dongsheng District (Mongolian: ᠳ᠋ᠦᠩᠱᠧᠩ ᠲᠣᠭᠣᠷᠢᠭ Дүншэн тоори "Düŋšėŋ toɣoriɣ"; ; alternate spelling English: Koshang; Turkic: Košang) is a District and the seat of Ordos City, Inner Mongolia, People's Republic of China.
 It has a district population of 230,579, with 162,317 in the urban area.
 The district is predominantly Han Chinese, but has a significant Mongol minority.
Rongcheng, Shandong
Rongcheng () is a county-level city of Weihai City, at the eastern extremity of Shandong Province, China, looking out to the Yellow Sea in all directions but the west.
Qingdao Aquarium
The Qingdao Aquarium () also known as the Qingdao Underwater World () is the oldest public aquarium in China.
 It is located in the city of Qingdao, Shandong Province.
 The aquarium originated from an initiative launched by the educator Cai Yuanpei in 1930 and was first opened to the public on May 8, 1932.
 As of 2013, the aquarium consists of four main exhibition halls that are connected by tunnels and provides nearly 10,000 square meters of total exhibition area.
 The Qingdao Aquarium has been listed as a major historical and cultural sites protected by Shandong Province since 2006 (site number 3-267).
 It is located right on shore of the Yellow Sea's Huiquan Bay (汇泉湾), next to the "No. 1 Bathing Beach" in the Shinan District of Qingdao. Yeonsu District
Yeonsu District (Yeonsu-gu) is a district in southern Incheon, South Korea.
 To the east is Namdong District (Namdong-gu), on its north border is Nam District (Nam-gu), and the Yellow Sea is on the west and south sides.
 Munhak Mountain (Munhak-san) rises in the north, and Seunggi Stream (Seunggi-cheon) flows south to the Yellow Sea. Laizhou Bay
Laizhou Bay () is the southern arm of the Bohai Sea (also known as the "Bohai Gulf", or just "Bo Hai"), which is a large relatively shallow extension of Korea Bay (Northern Yellow Sea) behind the Liaodong Peninsula to the north, and the Shandong Peninsula to the south.
 Both peninsulas are roughly triangular in shape and point towards the Bohai Strait, the mouth opening out to the "Yellow Sea" via the southern region of Korea Bay. Kang Bashi District
Kang Bashi District, or Hia Bagx District (Mongolian: ; ), is a subdivision of the Chinese city of Ordos, Inner Mongolia, situated in Northern China.
 It is located southwest of the Dongsheng urban area, the old center of the Ordos Municipality, and spans the border of Dongsheng District and Ejin Horo Banner. Battle of the Yalu River (1894)
The Battle of the Yalu River (; Japanese:Kōkai-kaisen (黄海海戦 , "Naval Battle of the Yellow Sea") ) was the largest naval engagement of the First Sino-Japanese War, and took place on 17 September 1894, the day after the Japanese victory at the land Battle of Pyongyang.
 It involved ships from the Imperial Japanese Navy and the Chinese Beiyang Fleet.
 The battle is also known by a variety of names: Battle of Haiyang Island, Battle of Dadonggou, Battle of the Yellow Sea and Battle of Yalu, after the geographic location of the battle, which was in the Yellow Sea off the mouth of the Yalu River and not in the river itself.
 There is also no agreement among contemporary sources on the exact numbers and composition of each fleet. Shandong Peninsula
The Shandong Peninsula is a peninsula in Shandong province in eastern China, between the Bohai Sea to the north and the Yellow Sea to the south. Paya Rumput
Paya Rumput is a town in Malacca state, Malaysia.
 It is near Alor Gajah District Border and Central Malacca District Border.
 The town has rapidly developed a residential area (Taman Paya Rumput Perdana) and a business area (Taman Paya Rumput Utama). Rizhao
Rizhao () is a prefecture-level city in southeastern Shandong province, China.
 It is situated on the coastline along the Yellow Sea, and features a major seaport.
 It borders Qingdao to the northeast, Weifang to the north, Linyi to the west and southwest, and faces Korea and Japan across the Yellow Sea to the east.