New Delhi, Sept 24 (ANI): Commerce Ministry said that the widening trade deficit with China is a matter of concern and not sustainable in the long run, as representatives from both countries met to explore greater business opportunities between the countries. India-China Business Matchmaking Symposium in New Delhi was organised by the Confederation of Indian Industry (CII) and Trade Development Bureau (TDB) of China, in the backdrop of exponential growth in the trade sector between the two countries in the last few years. The Chinese business delegation headed by Vice Director General of Chinese Trade Development Bureau (TDB) Jia Guoyong consisted of delegates from various sectors of business and trade.