Among those receiving titles were the rulers of the States of Ji and Yan, two states located in modern-day Beijing Municipality. The capital of Yan at Liulihe has been established with considerable certainty through archaeological evidence at Liulihe. The capital of Ji, is believed to be located further north, near modern-day Guang'anmen in Xicheng District. The artifacts unearthed at Liulihe demonstrate the Yan capital's wealth and political importance during the Western Zhou Dynasty dating back to at least the 11th century B.C. During the subsequent Eastern around in the 7th century B.C., the state of Yan conquered the State of Ji to the north and moved its capital from Liulihe to Ji, which became the urban center of Beijing for the next 2,000 years until the 13th century, when the city centre shifted further north during the Yuan Dynasty. The ancient city at Liulihe was discovered in 1962. Four major archaeological excavation were undertaken from 1972 to the early 1990s. The site was named a National Level Cultural Heritage Protection Site in 1988 and planning for a museum began in 1990. The Western Zhou Dynasty Yan Capital Site Museum opened on August 21, 1995. In 1996, a tortoise shell was discovered in H108 with the initials of King Cheng of Zhou, the second ruler of the Zhou Dynasty who ruled from 1042 to 1020 B.C. This artifact has been used in the Xia–Shang–Zhou Chronology Project. The museum complex occupies of land at the Liulihe Site. The main exhibition hall with display space is divided into seven halls—including the Halls of Bronze Ceremonial Ware, Entombed Chariots, Bronze Libation Vessels and Weapons, and Ceramic and Lacquerware. In all, there are over 300 artifacts and hundreds of other models and replicas on display. The museum is located near Dongjialin Village in Liulihe Township in Fangshan District off the G4 Expressway and National Highway 107. Parking is available. Beijing Bus Route No. 834, 835 and 835快 and Fangshan Bus Route No. 房27 and 房39 stop at the Shang Zhou Dynasty Site (商周遗址站). Admission is free to the museum, which is closed on Mondays.