The 22nd meeting of the Council of Heads of State of the Shanghai Cooperation Organization (SCO) is underway in Uzbekistan. Iran signed a Memorandum of Obligations at this year's summit, beginning a year-long formal process to attain full membership status. Iran's ambassador to China, Mohammad Keshavarzzadeh, says the country is now one step closer to what it first applied for 15 years ago. CGTN reporter Dong Xue sat down with him for more insights.