This will be the fourth visit of Modi to China after he came to power in 2014.
'Xi's emphasis on enhancing conventional military deterrence capabilities, joint operations and power projection are likely to increase friction points with India as with other nations,' points out China expert Srikanth Kondapalli.
Home to 12 million Uyghurs, who are Muslim, the Xinjiang Uyghur Autonomous Region has been the target of the Chinese Communist party's worst human rights excesses.
'Till today, we don't know what PM Modi discussed with Xi Jinping and Vladimir Putin, but we have been told that the relations have been reset.' 'We have no evidence from China to show that anything has changed, even though India had made several gestures in preparation for Wuhan,' says Ambassador T P Sreenivasan.
Topics like 'Boycott China', 'Go China' and 'Go Chinese Go' have been trending on Twitter.
"Both India and China are victims of terrorism and the region was suffering from the menace. The prime minister said no country is immune from terrorism and on this issue, we cannot afford to have any differences," MEA spokesperson Vikas Swarup told reporters after the meeting.
China is pulling out all the stops to give a 'state visit-plus' reception to Trump on his maiden visit.
Why omit the Tiananmen massacre from the history of China's Communist party, asks Claude Arpi.
Government sources also said there was no question of any discussion on the issue as it is India's sovereign matter but added that Modi will update the Chinese President on the matter if there is a query.
It is the first meeting between the two leaders after India boycotted the high-profile Belt and Road Forum.
Chinese President Xi Jinping has suggested five thrust areas to improve relations with India. It is likely all these issues, in addition to the points raised by Xi at Fortaleza, will be part of the joint declaration at the end of his visit to India, says Srikanth Kondapalli.
About 30 airports have been either built or under construction in Tibet and Xinjiang provinces which will boost China's civil and military infrastructure in the remote regions bordering India, the country's official media reported.
'The border deal offers a hedge for India against Trump's unpredictability when it comes to his approach to competition with China.'