India and China traded another round of diplomatic blows with Beijing officially taking up with New Delhi President Pranab Mukherjee’s Arunachal visit. While it made its reservation public earlier in the day, China decided to up the ante later by taking up the issue bilaterally with India, much to the chagrin of authorities here. According to sources, India reacted promptly by giving an appropriate response to Beijing. Indian officials reiterated what Mukherjee said in Itanagar, that Arunachal Pradesh was an integral part of India. Beijing is said to have conveyed to India that official visits to Arunachal were not in the interest of ties between the two countries.