Given the question: Information:  - Hong Kong, officially the Hong Kong Special Administrative Region of the People's Republic of China, is an autonomous territory on the Pearl River Delta of East Asia. Macau lies across the delta to the west, and the Chinese province of Guangdong borders the territory to the north. With a total land area of and a population of over 7.3 million of various nationalities, it ranks as the world's fourth most densely populated sovereign state or territory.  - China, officially the People's Republic of China (PRC), is a unitary sovereign state in East Asia. With a population of over 1.381 billion, it is the world's most populous country. The state is governed by the Communist Party of China, and its capital is Beijing. It exercises jurisdiction over 22 provinces, five autonomous regions, four direct-controlled municipalities (Beijing, Tianjin, Shanghai, and Chongqing), and two mostly self-governing special administrative regions (Hong Kong and Macau), and claims sovereignty over Taiwan. The country's major urban areas include Shanghai, Guangzhou, Beijing, Chongqing, Shenzhen, Tianjin and Hong Kong. China is a great power and a major regional power within Asia, and has been characterized as a potential superpower.  - Hong Kong Island is an island in the southern part of Hong Kong. It has a population of 1,289,500 and its population density is 16,390/km², . The island had a population of about 3,000 inhabitants scattered in a dozen fishing villages when it was occupied by the United Kingdom in the First Opium War. In 1842, the island was formally ceded in perpetuity to the UK under the Treaty of Nanking and the City of Victoria was then established on the island by the British Force in honour of Queen Victoria.  - Peng Chau is a small island located off the north-eastern coast of Lantau Island, Hong Kong. It is known for its temples, its small island lifestyle and accessibility to fresh seafood.  - Cheung Chau (lit. "Long Island") is an island southwest of Hong Kong Island. It is nicknamed the 'dumbbell island ()' due to its shape. It has been inhabited for longer than most other places in the territory of Hong Kong, and had a population of 22,740 . Administratively, it is part of the Islands District. Geography. Geographically the island is formed from two mostly granite masses joined by a tombolo. With an area of , the island is therefore "long", hence the name as translated from Cantonese is "Long Island". Thus, it is redundant to say "Cheung Chau Island". The island is dumbbell-shaped, with hills at the northern and southern ends and the settlements concentrated in between.  - New Territories (Hakka: "Sin Gai") is one of the three main regions of Hong Kong, alongside Hong Kong Island and the Kowloon Peninsula. It makes up 86.2% of Hong Kong's territory, and contains around half of the population of Hong Kong. Historically, it is the region described in The Convention for the Extension of Hong Kong Territory. According to that the territories comprise the mainland area north of the Boundary Street of Kowloon Peninsula and south of the Sham Chun River which is the border between Hong Kong and Mainland China, as well as over 200 outlying Islands including Lantau Island, Lamma Island, Cheung Chau, and Peng Chau in the territory of Hong Kong.  - Boundary Street is a three-lane one-way street in Kowloon, Hong Kong. It runs in an easterly direction from its start at the intersection with Tung Chau Street in the west, and ends at its intersection with Prince Edward Road West in the east, near the former Kai Tak Airport.  - Lantau Island (also Lantao Island; Chinese: ) is the largest island in Hong Kong, located at the mouth of the Pearl River. Administratively, most of Lantau Island is part of the Islands District of Hong Kong. A small northeastern portion of the island is located in the Tsuen Wan District.  - Mainland China, also known as the Chinese mainland or simply the mainland, is the geopolitical area under the direct jurisdiction of the People's Republic of China (PRC). It generally excludes the Special Administrative Regions of Hong Kong and Macau; however, it usually includes Hainan. The term "mainland China", which avoids calling the area simply "China" and thereby recognizing the founding of the PRC as "the" "China", was coined by the Kuomintang (KMT) after receiving control of Taiwan from Japan after World War II. By 1949, the KMT-led Republic of China (ROC) government was defeated in the Chinese Civil War in mainland China and fled to the island of Taiwan where the KMT pledged to "retake the Mainland". The KMT considers both sides of the Taiwan Strait (including Taiwan), as (one) "China" and one country, whereas Taiwan's Democratic Progressive Party (DPP) considers only mainland China as "China" and Taiwan (ROC) as "Taiwan" and maintains that they are different countries.  - The Kowloon Peninsula is a peninsula that forms the southern part of the main landmass in the territory of Hong Kong. The Kowloon Peninsula and the area of New Kowloon are collectively known as Kowloon.  - Sham Chun River (also called Shenzhen River in Shenzhen) serves as the natural border between Hong Kong and Mainland China, together with the Sha Tau Kok River and Deep Bay.  - Kowloon is an urban area in Hong Kong comprising the Kowloon Peninsula and New Kowloon. It is bordered by the Lei Yue Mun strait to the east, Mei Foo Sun Chuen and Stonecutter's Island to the west, a mountain range, including Tate's Cairn and Lion Rock to the north, and Victoria Harbour to the south. It had a population of 2,019,533 and a population density of 43,033/km in 2006. The peninsula's area is approximately .  - Lamma Island, also known as Pok Liu Chau or simply Pok Liu, is the third largest island in Hong Kong (). Administratively, it is part of the Islands District.  - Yuen Long District ( Chinese :  , Jyutping : jyun4 long5 , pinyin : Yuánlng , formerly known as Un Long ) is one of the districts of Hong Kong . Located in the northwest of the New Territories , it had a population of 449,070 in 2001 . The district has the youngest population of Hong Kong .    What is the relationship between 'yuen long district' and 'district of hong kong'?
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