The ambassador enquired about their stay in China and assured all support, a twitter message posted by the embassy said.
Deputy ambassador Amit Narang has hosted a lunch for them, the embassy officials said.
Wang who arrived in his native village near Xian last month for the fist time after over 54 years is currently touring Beijing and expected to return to his village in the next few days and later decide his plans to return to India.
Wangwas caught when he entered the Indian territory shortly after the Sino-India War of 1962.
He was later released from jail and settled in Tirodi village of Balaghat district in Madhya Pradesh where he married a local woman.
Wang returned to China on February 11 after India and China worked out modalities for bothWangand his Indian family to travel together to Beijing and later return as per their wish and stayed near Xian meeting friends and relatives.