2006–2008 Bangladeshi political crisis. Both have considerable cooperation in summits organised by BIMSTEC and the ASEAN regional forum. Upper class and upper middle class Bangladeshis often go to Thailand for medical treatment and operations that the country's medical infrastructure cannot provide. Brunei Brunei has an embassy in Bangkok, and Thailand has an embassy in Bandar Seri Begawan. The relations have always been close and cordial. Cambodia Parts of Cambodia's border with Thailand are indefinite, and the maritime boundary with Thailand is not clearly defined. On 5 November 2009 Thailand recalled its ambassador from Cambodia in protest of the Cambodian government's appointment of Thai ex-leader Thaksin Shinawatra as an economic adviser. Thai Prime Minister Abhisit Vejjajiva stated that this was "the first diplomatic retaliation measure" against the appointment. He also said that Cambodia was interfering in Thai internal affairs and as a result bi-lateral co-operation agreements would be reviewed. The Cambodian government has stated that it would refuse any extradition request from Thailand for Thaksin as it considered him to be a victim of political persecution. In the months leading up to the Cambodian decision, troops from both nations had clashed over territory claimed by both countries immediately adjacent to Cambodia's Preah Vihear temple, leading to a deterioration in relations. At 20:30 on 5 November Cambodia announced that it was withdrawing its ambassador from Thailand as a retaliatory measure. Sok An, a member of the Council of Ministers and Deputy Prime Minister of Cambodia, said that the appointment of Thaksin is a decision internal to Cambodia and that it "conforms to international practice". The mutual withdrawal of ambassadors is the most severe diplomatic action to have occurred between the two countries. China Thailand established diplomatic relations with the PRC on 1 July 1975. It remains as a key regional ally of China, with growing cooperation between both countries. For an evaluation of Sino-Siamese relations, see Siamese Inter-State Relations in the Late Nineteenth Century: From An Asian Regional Perspective. India Diplomatic relations between India and Thailand were established in 1947, soon after India gained independence. Thailand maintains three diplomatic posts in India: in Mumbai, in New Delhi, and in Calcutta. India maintains three enclaves in Thailand: in Bangkok, Chiang Mai, and A Muang. The end of the Cold War led to a significant enhancement in the substance and pace of bilateral interactions. Indian Look East policy from 1993 and Thailand's Look West