Tianjin vs Aden City

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Tianjin ([tʰjɛ́n.tɕín] (listen)), alternately romanized as Tientsin, is a municipality and a coastal metropolis in Northern China on the shore of the Bohai Sea. It is one of the nine national central cities in Mainland China, with a total population estimated at 15,621,200 in 2016. Its built-up (or metro) area, made up of 12 central districts (all but Baodi, Jizhou, Jinghai and Ninghe), was home to 12,491,300 inhabitants in 2016 and is also the world's 29th-largest agglomeration (between Chengdu and Rio de Janeiro) and 11th-most populous city proper.It is governed as one of the four municipalities under the direct administration of Chinese central government and is thus under direct administration of the State Council. Tianjin borders Hebei Province and Beijing Municipality, bounded to the east by the Bohai Gulf portion of the Yellow Sea. Part of the Bohai Economic Rim, it is the largest coastal city in northern China. In terms of urban population, Tianjin is the fourth largest in China, after Shanghai, Beijing, and Guangzhou. In terms of administrative area population, Tianjin ranks fifth in Mainland China. The walled city of Tianjin was built in 1404. As a treaty port since 1860, Tianjin has been a major seaport and gateway to Beijing. During the Boxer Rebellion the city was the seat of the Tianjin Provisional Government. Under the Qing dynasty and the Republic of China, Tianjin became one of the largest cities in the region.

At that time, numerous European-style buildings and mansions were constructed in concessions, many of which are well-preserved today. After the founding of the People's Republic of China, Tianjin suffered a depression due to the policy of the central government and Tangshan earthquake, but recovered from 1990s. Nowadays Tianjin is a dual-core city, with its main urban area (including the old city) located along the Hai River, which connects to the Yellow and Yangtze Rivers via the Grand Canal; and Binhai, an adjacent New Area urban core located east of the old city, on the coast of the Bohai Gulf. As of the end of 2010, around 285 Fortune 500 companies have set up base in Binhai. Since 2010, Tianjin's Yujiapu Financial District has become known as China's Manhattan and the city is considered as one of the world's top 100 cities, including in the Global Financial Centres Index. Tianjin is ranked as a Beta global city by the Globalization and World Cities Research Network. Tianjin is also one of the top 25 science cities in the world by scientific research as tracked by the Nature Index and home to multiple notable institutes of higher education, including Tianjin University, Nankai University and Tianjin Medical University.

Source: Wikipedia

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Aden is the UK's AY-d@n and US's AH-den. It is located near the Red Sea (the Gulf of Aden) at 170 km (110 miles) east of Bab-el-Mandeb. The city is home to approximately 800,000. Aden's natural harbour is located in the crater a dormant volcano. It now forms a peninsula that connects to the mainland via a low isthmus. Front Bay was the first harbour to be used by the ancient Kingdom, Awsan, between the 7th and 5th centuries BC. On the opposite side of the peninsula is the modern harbour. The Gulf of Aden is named after Aden. Aden is made up of several sub-centres. Crater was the original port city. Maalla was the modern port. Tawahi, also known as Steamer Point during colonial times, and the resorts at Gold Mohur are all part of the main centre. Khormaksar is located on the isthmus connecting Aden with the mainland. It houses the city's diplomatic missions and the main offices for Aden University. Aden International Airport, which was formerly the British Royal Air Force station RAF Khormaksar (Yemens second largest airport), is also here. The sub-centres and Al-Mansura are located on the mainland. These were once an oasis area. Madinat ash-Shab, formerly Madinat al-Itihad, is now the capital of South Arabian Federation. It also houses Aden University's large power/desalinization plant and additional faculties. Aden surrounds the eastern end of the vast, natural harbour that forms the modern port. This made it necessary to create the Cisterns at Tawila, Aden's reservoirs.

According to Ibn Battuta (14th-century scholar), these reservoirs store rainwater solely for the purpose of drinking by the citizens. It is a prosperous city with many wealthy merchants and Indian ships arriving to trade. The port and harbour on the west side are enclosed by the volcanic peninsula of Little Aden. Little Aden was the location of the oil refinery, and the tanker port. They were both established by British Petroleum and were operated until 1978 when they were handed over to the Yemeni government. Aden was the capital of Peoples Democratic Republic of Yemen from 1990 to its unification with Yemen Arab Republic. It briefly served again as Yemen's temporary capital after the Houthi takeover of Yemen. This was declared by President Abd Rabbuh Mansur Hadi following his escape from the Houthi occupation of Sanaa. The Battle of Aden was fought between President Hadi's government forces and the Houthis from March 2015 to July 2015. The city was short of water, food, and medical supplies. The Saudi Army launched an offensive on 14 July to retake Aden in support of the Yemeni government. The Houthis were expelled from Aden within three days. The Southern Transitional Council has seized Aden since February 2018. Supported by UAE, the Southern Transitional Council has taken control of Aden. Former Mayor Aidroos Alzubaidi was fired by Abdrabbuh Mansur Hadi and sacked ex-Minister Salfi-religious leader Hani Bin Buraik.

Source: Wikipedia