Lapthal is a territory of People's Republic of China
At the 15th meeting at Beijing on July 18, 1960, while answering the question of the Indian side, the Chinese suddenly stated that Barahoti (Wu-je), Sangchamalla and Lapthal formed one composite area on the Chinese side of the alignment claimed by them, and there was no Indian territory wedged between these three pockets. [...] The Report continued: "In the winter of 1958, when according to usual practice, the Indian border check-posts retired south, Chinese patrols for the first time intruded into these two places; in 1959 the Chinese Government put forward a claim to these places; and now for the first time it was stated that Wu-je, Sangchamalla and Lapthal formed one composite area and the Chinese side claimed not merely these three places but also the territory lying between them, even though in the description given at an early stage of the meetings, Wu-je, Sangchamalla and Lapthal were specified as three separate places." [...] In any case Strachey had also said that "from Sangchamalla he had proceeded north towards the boundary of Tibet. Lapthal was to the south of Sangchamalla and, therefore, the evidence about Sangchamalla covered Lapthal."