Question: Which Chinese city has more inhabitants, Gejiu or Dujiangyan City?

Context paragraphs:
Dujiangyan City: Dujiangyan () is a county-level city, a subdivision of Chengdu, the capital of Sichuan Province, People's Republic of China.  Its north-west region forms a border with sourthern Ngawa Tibetan and Qiang Autonomous Prefecture.  It has an area of 1208 km2 and had a population of 600,000 in 2003.

Juyuan High School: Dujiangyan August 1 Juyuan High School (Chinese Simplified: 都江堰市八一聚源高级中学, Traditional: 都江堰市八一聚源高級中學, Pinyin: Dūjiāngyànshì Bāyī Jùyuán Gāojízhōngxué, BYJYGZ) is a secondary school located in Dujiangyan City, Chengdu, Sichuan.

Gejiu:    (个旧 ; Hani: "Goqjef"; Wade-Giles: "Ko-Chiu"; formerly known as Kotchiu) is a county-level city and the former capital of Honghe prefecture, Yunnan Province, China, and has 136,000 inhabitants (ranked 5th largest city in Yunnan).  It is the site of the country's largest tin deposits and its main industry is mining.

Dengsheng: Dengsheng () is an area in Wolong National Nature Reserve, Wenchuan County, Sichuan, China.  It is located in the southwestern part of the Wolong National Nature Reserve, approximately 77 miles WNW of Chengdu, the capital of Sichuan province), approximately 62 miles southwest of Wenchuan county seat, Weizhou, approximately 47 miles WSW of Dujiangyan City, approximately 122 miles southwest of Beichuan County and approximately 128 miles WSW of Mianyang.

Dujiangyan: The Dujiangyan () is an ancient irrigation system in Dujiangyan City, Sichuan, China.  Originally constructed around 256 BC by the State of Qin as an irrigation and flood control project, it is still in use today.  The system's infrastructure is on the Min River (Minjiang), the longest tributary of the Yangtze.  The area is in the west part of the Chengdu Plain, at the confluence between the Sichuan basin and the Tibetan plateau.  Originally the Min rushed down from the Min Mountains, but slowed abruptly after reaching the Chengdu Plain, filling the watercourse with silt, which made the nearby areas extremely prone to floods.  Li Bing, then governor of Shu for the state of Qin, and his son headed the construction of the Dujiangyan, which harnessed the river using a new method of channeling and dividing the water rather than simply following the old way of dam building.  It is still in use today to irrigate over 5,300 km2 of land in the region.  The Dujiangyan, the Zhengguo Canal in Shaanxi and the Lingqu Canal in Guangxi are collectively known as the "three great hydraulic engineering projects of the Qin."

Chengdu–Dujiangyan Intercity Railway: The Chengdu–Dujiangyan Intercity Railway is a dual-track, electrified, passenger-dedicated, high-speed rail line in Sichuan Province, China.  It connects the provincial capital, Chengdu with the satellite city of Dujiangyan in Guan County.  The line is 65 km in length with 15 stations.  China Railways CRH1 train sets on the line reach a maximum speed of 220 km/h and make the full-trip in 30 minutes.  The line was built in 18 months and entered into operation on May 12, 2010.  The railway is built to withstand an 8.0-magnitude earthquake.  The Chengdu–Dujiangyan Intercity Railway has two branch lines : Pengzhou Branch line is 21.2 km in length with 6 stations, and Lidui Branch line is 6 km in length with 3 stations.

Kuiguang Pagoda: The Kuiguang Pagoda (Chinese: 奎光塔; pinyin: Kúi Gūang Tǎ ) of Dujiangyan City, Sichuan province, China, is a pagoda built in 1831 during the Qing dynasty.

Dujiangyan Phoenix Stadium: The Dujiangyan Phoenix Stadium (Chinese: 都江堰凤凰体育场) is a multi-purpose stadium in Dujiangyan, Sichuan, China.  It is currently used mostly for association football matches.  The stadium holds 12,700 people.  The venue broke ground in February 2008 with original name Dujiangyan Sports Centre Stadium.  It opened in May 2010 with a new name "Phoenix", which was in memory of the city rebirth from 2008 Sichuan earthquake.

Sichuan Leaders F.C.: Sichuan Leaders Football Club () are a China League Two club.  They are an association football club from Dujiangyan City.  The Sichuan Leaders were a new entry in the 2014 China League Two.  The Dujiangyan Sports Centre Stadium is their home venue.

G0511 Deyang-Dujiangyan Expressway: G0511 Deyang–Dujiangyan Expressway(Chinese:德都高速公路, 德都高速) is a part of Chengdu Economic Zone Ring Expressway, starting from Deyang City in Sichuan Province, the way Shifang, Pengzhou, only in Dujiangyan City, Sichuan Province.

Supporting paragraphs: Gejiu Dujiangyan City
Answer: Dujiangyan