India's outgoing envoy Ashok K Kantha, who will be retiring on January 6, said 2016 will be marked by high level visits as Modi is expected to visit China to take part in G-20 summit to be held in east China's Hangzhou city while Xi may visit India to participate in the BRICS summit.
The expected high-level trips come in the backdrop of highly successful visits of Xi to India in 2014 and Modi to Beijing last year, reflecting the buoyant state of ties which have seen all round development of cooperation in the last few years including in security and defence areas besides trade and investment, Kantha said.
Also, Politburo-level officials of the ruling Communist Party of China visited India, Kantha said.
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This year's interactions will begin with the visit National Security Advisor Ajit Doval who is expected to be in Beijing on a two-day visit starting on January 5.
He is due to meet his counterpart and China's top diplomat Yang Jiechi and Premier Li Keqiang.
Doval's visit is part of the "architecture for strategic communication" set up by both countries, Kantha said.
"He is coming for strategic consultations," Kantha said declining to provide details.
Yang and Doval are designated Special Representatives for border talks. So far the two sides have held 18 rounds of border talks.
But despite the all round progress, it still remains an uneasy relationship due to the unresolved boundary issue, Kantha said.
"For us the good news is we have been successful in
maintaining peace and tranquillity without a bullet fired in three decades and no major standoffs took place at the border last year unlike like 2013 and 2014," he said.
The issues were resolved after prolonged negotiations followed by setting up of special mechanism to address the issues relating to the patrolling of the disputed areas of the LAC.
Kantha said defence and security sectors have witnessed major improvement.
High level visits of military personnel took place this year, including the India trip of Fan Changlong, Vice Chairman of the China's highest military body Central Military Commission, and the Beijing visit of Northern Commander of the Indian Army Lt Gen D S Hooda.
On security issues, India and China have decided to step up cooperation on counter terrorism during the recent visit of Home Minister Singh.
Both sides also decided to set up a high level ministerial mechanism.
A draft agreement on the mechanism is ready and it was expected to be signed when the Chinese delegation comprising of high level interior ministry officials visits India later this year.
Asked whether China has agreed to address India's concerns relating to terrorist groups in the North East region, Kantha declined to go into details, saying that the two countries have agreed to step up cooperation including on intelligence.
"When it comes to China, our dialogue is mature enough to include matters of concerns to us," he said.
On cross border terrorism emanating from Pakistan, Kantha said China too has similar concerns specially in dealing with militancy in Xinjiang, home of Uyghur Muslims.
"We do not have to agree on everything," he said.