Question: Which city's name means Elm Tree, Bengbu or Yushu, Jilin? 

full_context: Document 1: Yilan County, Heilongjiang: Yilan County () is under the administration of Harbin, the capital of Heilongjiang province, People's Republic of China. It is more than 240 km to the east-northeast of central Harbin. Its county seat, which is also called Yilan (Yilan Town, "Yilan zhen"), is located near the confluence of the Mudan River (formerly known as the Hurka River) with the Sungari. The easternmost county-level division of Harbin City, it borders Fangzheng County to the southwest, Tonghe County to the west, as well as the prefecture-level cities of Yichun to the north, Jiamusi to the northeast, Qitaihe to the southeast, and Mudanjiang to the south.
Document 2: Bengbu: Bengbu () is a mid-sized city in northern Anhui Province, China. Its built-up ("or metro") area made of 4 urban districts has nearly one million residents, though the Prefecture-level city under its jurisdiction had 3,164,467 registered residents at the 2010 census. Its name means "Oyster Wharf" in Chinese, echoing its former reputation as a freshwater pearl fishery.
Document 3: Lu'an: Lu'an (), is a prefecture-level city in western Anhui province, People's Republic of China, bordering Henan to the northwest and Hubei to the southwest. At the 2010 census, it had a total population of 5,612,590, whom 1,644,344 resided in the built-up area made of 2 urban districts. Neighbouring prefecture-level cities are the provincial capital of Hefei to the east, Anqing to the south, Huanggang (Hubei) and Xinyang (Henan) to the west, and Huainan and Fuyang to the north. Although the character "六 " (literally: "six") is normally pronounced "Liù", in this case it changes to "Lù" on account of the historical literary reading.
Document 4: Huainan: Huainan () is a prefecture-level city with 2,334,000 inhabitants in central Anhui Province, People’s Republic of China. It borders the provincial capital of Hefei to the south, Lu'an to the southwest, Fuyang to the west, Bozhou to the northwest, Bengbu to the northeast and Chuzhou to the east.
Document 5: Dehui: Dehui () is a county-level city under the jurisdiction of Changchun, the capital of Jilin province, People's Republic of China, located in the middle of the Songliao Plain. It has a total population of 906,000 and a rural population of 753,000. Composed of 10 towns, 4 townships and 4 subdistricts, under which there are 308 villages, it is around 80 km north-northeast of central Changchun. It borders Yushu to the northeast, Jiutai to the south, Kuancheng District to the southwest, Nong'an County to the west, as well as the prefecture-level cities of Jilin to the southeast and Songyuan to the northwest.
Document 6: Changchun: Changchun () is the capital and largest city of Jilin Province, and is located in the northeast of China. Lying in the center of the Songliao Plain, Changchun is administered as a , comprising 7 districts, 1 county and 2 county-level cities. According to the 2010 census of China, Changchun had a total population of 7,674,439 under its jurisdiction. The city's urbanized ("or metro") area, comprising 5 districts and 4 development areas, had a population of 3,815,270 in 2010 as the Shuangyang and Jiutai districts are not urbanized yet.
Document 7: Yanji: Yanji ("Yeon-gil" or "Yenji" in Korean, formerly romanized as Yenki) is a county-level city in the east of China's Jilin Province, and is the seat of the Yanbian Korean Autonomous Prefecture. Its population is approximately 400,000 of which a large portion is ethnic Korean. Yanji is a busy hub of transport and trade between China and North Korea.
Document 8: Yichun, Heilongjiang: Yichun () is a prefecture-level city on the Songhua river in Heilongjiang province, People's Republic of China. The city is separated from Russia by the Amur River and has an international border of 246 km . At the 2010 census, Yichun has a total population of 1,148,126 while 729,202 people live in 15 districts separated by forests. The greening rate of Yichun is up to 83%. The nickname of Yichun is Lindu ().
Document 9: Quanzhou: Quanzhou, formerly known as Chinchew, is a prefecture-level city beside the Taiwan Strait in Fujian Province, China. Its is Fujian's largest metropolitan region, with an area of 11,245 km2 and, as of the 2010 census, a population of 8,128,530. Its built-up area is home to 6,107,475 inhabitants, encompassing the Licheng, Fengze, and Luojiang urban districts; Jinjiang, Nan'an, and Shishi cities; Hui'an County; and the Quanzhou District for Taiwanese Investment. Quanzhou was China's 12th-largest extended metropolitan area in 2010.
Document 10: Jilin–Hunchun Intercity Railway: Jilin–Hunchun Intercity Railway, also known as Ji-Hun Passenger Dedicated Line, is a high-speed railway in China's Jilin Province. It connects the provincial capital of Jilin City and the eastern provincial city of Hunchun near the border with Russia and North Korea. It will have a total length of 359 km of electrified double-track railways, built to the Grade 1 standard. Project construction started on October 30, 2010, with operations commencing on September 20, 2015. The railway has been described as "Dongbei's most beautiful railway" (due to the terrain it runs through) and "the fastest way to Vladivostok" (4 hours by train from Shenyang to Hunchun, plus 4 hours by bus from Hunchun to Vladivostok). Reflecting the border location of the city, the new train station has its sign in four languages: Chinese, Korean, Russian, and English. Future prospects could see the line extended into Russia to Vladivostok.
Document 11: Chuzhou: Chuzhou () is a prefecture-level city in eastern Anhui Province, China. It borders the provincial capital of Hefei to the southwest, Huainan to the west, Bengbu to the northwest, Chaohu to the south, and the province of Jiangsu to the east. According to the 2010 Census, the city of Chuzhou has a registered population of 3,937,868 inhabitants, whom 562,321 lived in the built-up ("or metro") area made of 2 urban districts. Nevertheless, 7,260,240 persons declared to be permanent residents.
Document 12: Ningbo:    , formerly written Ningpo, is a sub-provincial city in northeast Zhejiang province in China. It comprises the urban districts of Ningbo proper, three satellite cities, and a number of rural counties including islands in Hangzhou Bay and the East China Sea. Its port, spread across several locations, is among the busiest in the world and the municipality possesses a separate state-planning status. As of the 2010 census, the entire administrated area had a population of 7.6 million, with 3.5 million in the six urban districts of Ningbo proper. To the north, Hangzhou Bay separates Ningbo from Shanghai; to the east lies Zhoushan in the East China Sea; on the west and south, Ningbo borders Shaoxing and Taizhou respectively.
Document 13: Hunchun: Hunchun is a county-level city in the Yanbian Korean Autonomous Prefecture, far eastern Jilin province, Northeast China. It borders North Korea (North Hamgyong province) and Russia (Primorsky Krai), has over 250,000 inhabitants, and covers 5,145 square kilometers. It was capital of Balhae/Bohai Kingdom between 785-793 as "Dongyang". The city's name Hunchun comes from the Manchu language meaning "borderland".
Document 14: Dongguan: Dongguan is a prefecture-level city in central Guangdong Province of South China. Often considered the cultural capital of the Pearl River Delta, Dongguan borders the provincial capital of Guangzhou to the north, Huizhou to the northeast, Shenzhen to the south, and the Pearl River to the west. It is part of the Pearl River Delta megacity with more than 44.78 million inhabitants at the 2010 census spread over nine municipalities (including Macao) across an area of 17,573 km2 . Dongguan's city administration is considered especially progressive in seeking foreign direct investment. Dongguan ranks behind only Shenzhen, Shanghai and Suzhou in exports among Chinese cities, with $65.54 billion in shipments. It is also home to one of the world's largest, though largely empty, shopping malls, the New South China Mall. The majority of the population speak Mandarin due to migrants from other parts of the country.
Document 15: Yushu, Jilin: Yushu () is a county-level city under the jurisdiction of Changchun, the capital of Jilin province, People's Republic of China. It is more than 140 km to the northeast of central Changchun, and around 100 km south of Harbin. The name of the place means "Elm Tree". The northernmost county-level division of Changchun, it borders Dehui to the southwest as well as the prefecture-level division of Harbin (Heilongjiang) to the northeast.
ground_truth: Yushu