New Delhi, Jan. 17 -- US President Donald Trump shocked Prime Minister Narendra Modi by telling him that India did not share a border with China and it set back ties between the two countries, according to a book on the presidency.

"It's not like you've got China on your border," Trump told Modi according to the book by two Washington Post reporters, who quoted an anonymous aide.

"After Trump bungles his India-China geography and seems to dismiss the threat China poses to India, for instance, the authors write that 'Modi's eyes bulged out in surprise,'" the newspaper wrote.

"Modi's expression gradually shifted, from shock and concern to resignation," Philip Rucker and Carol D. Leonnig claim in their book, "A Very Stable Genius," accordin...