In 1998 a Japanese expedition secured permission from the Chinese Mountaineering Association to climb the mountain, but permission was withdrawn because of a political issue with Bhutan. Instead, in 1999, the team set off from Tibet and successfully climbed the 7,535 metre subsidiary peak Liankang Kangri (also known as Gangkhar Puensum North). Unlike most maps, the expedition's report shows this summit as being in Tibet and the Tibet–Bhutan border is shown crossing the summit of Gangkhar Puensum, described as "the highest peak in Bhutan," at 7,570 metres.[7] This elevation is supported by Japanese sources, in turn based on Chinese sources.