Fund and the Group of 77. Bhutan maintains strong economic, strategic, and military relations with India. In February 2007, the Indo-Bhutan Friendship Treaty was substantially revised, clarifying Bhutan's full control of its foreign relations, as well as its independence and sovereignty. Whereas the Treaty of 1949, Article 2 stated: "The Government of India undertakes to exercise no interference in the internal administration of Bhutan. On its part the Government of Bhutan agrees to be guided by the advice of the Government of India in regard to its external relations," the revised treaty now states "In keeping with the abiding ties of close friendship and cooperation between Bhutan and India, the Government of the Kingdom of Bhutan and the Government of the Republic of India shall cooperate closely with each other on issues relating to their national interests. Neither government shall allow the use of its territory for activities harmful to the national security and interest of the other." The revised treaty also includes this preamble: "Reaffirming their respect for each other's independence, sovereignty and territorial integrity", an element absent in the earlier version. By long-standing agreement, Indian and Bhutanese citizens may travel to each other's countries without a passport or visa, but must still have their national identity cards. Bhutanese citizens may also work in India without legal restrictions. Bhutan does not have formal diplomatic ties with China, but exchanges of visits at various levels between them have significantly increased in recent times. The first bilateral agreement between China and Bhutan was signed in 1998 and Bhutan has also set up honorary consulates in the Special Administrative Regions of Hong Kong and Macau. Bhutan's border with China is not mutually demarcated in some areas because China lays claims to those places. In 2021, after more than 35 years of border negotiations, China signed a memorandum of understanding with Bhutan to expedite those talks. Approximately remain under discussion between China and Bhutan. On 13 November 2005, Chinese soldiers crossed into the disputed territories between China and Bhutan and began building roads and bridges. Bhutanese Foreign Minister Khandu Wangchuk took up the matter with Chinese authorities after the issue was raised in the Bhutanese parliament. In response, Foreign Ministry spokesman Qin Gang of the People's Republic of China said that the border remains in dispute and that the two sides are continuing to work for a peaceful and cordial resolution of the