Kong to China. Construction of the new airport began in 1991. As construction progressed, an agreement was reached with China that as much as possible of the airport would be completed before the handover to China in July 1997. In the event, British Prime Minister John Major opened the Tsing Ma Bridge, the main access to Lantau Island and the airport and its supporting community in May 1997, prior to the transfer of sovereignty to China. The airport itself was opened in July 1998. The construction period was very rushed; specialists considered that only a 10–20-year period was sufficient for this massive project. Another cause for this rush was due to the uncertain future of the airport construction after the transfer of sovereignty over Hong Kong to the People's Republic of China. Shortly after the then-British colonial government of Hong Kong announced plans to construct the new airport, the Chinese government in Beijing began voicing objections to various aspects of the massive project, which prompted financial institutions to delay extending project finance. Without access to this financing, many of the companies who had secured contracts to build various portions of the project halted construction, resulting in delays that pushed the actual opening of the airport, originally planned to take place before the transition in sovereignty until one year after. As agreements were reached with the government in China, Beijing removed most of its objections and work then continued, albeit behind schedule. Hong Kong International Airport was built on a large artificial island formed by flattening and levelling the former Chek Lap Kok and Lam Chau islands ( and respectively) and reclaiming of the adjacent seabed. The airport site, with its reclamation, added nearly 1% to Hong Kong's total surface area, connecting to the north side of Lantau Island near Tung Chung new town. Construction of the new airport was only part of the Airport Core Programme, which also involved the construction of new roads and rail links to the airport, with associated bridges and tunnels, and major land reclamation projects on both Hong Kong Island and in Kowloon. The project holds the record for the most expensive airport project ever, according to Guinness World Records. Construction of the new airport was also voted as one of the Top 10 Construction Achievements of the 20th Century at the ConExpo conference in 1999. The detailed design for the airport terminal was awarded