An information and communication technology engineer, Zhao has served in a variety of senior management positions at ITU, and will now begin his second, and last, four-year term in January 2019.
Member states of the ITU re-elected Zhao at the Union's 20th Plenipotentiary Conference in Dubai, United Arab Emirates.
Zhao won the position with 176 votes, from 178 ballot papers deposited, after contesting the position unopposed.
“Since being elected secretary-general of ITU in 2015, Houlin Zhao has attained marked achievements in overcoming the challenges that ITU faces in advancing its work and activities by way of promoting reform and innovation," said Wei Miao, Minister of Industry and Information Technology of China in putting forward Zhao for re-election.
“His pragmatism and spirit of teamwork has been widely recognised. We are confident that Mr Zhao will undoubtedly continue to lead ITU in playing an even more important role in the worldwide development of information and communication technologies."