The degree of penetration is sometimes spectacular, as shown by the Golden Triangle Special Economic Zone, a 101 sq km area given as a concession for 99 years to China's Kings Romans group, where an architecturally exuberant casino capped by a huge fairy-tale crown dominates a newly built Chinatown. Chinese companies are building no fewer than 30 hydroelectric dams in the region, including seven on the Nam Ou river, a tributary of the Mekong. Just outside the old city of Luang Prabang, listed as a World Heritage site by the United Nations, the Yunnan Luang Prabang company is building a five-star resort that will be the largest hotel complex near the former royal capital