Zhang Dejiang (L), chairman of the Standing Committee of China's National People's Congress, and Latvian Parliament Speaker Inara Murniece sign a Memorandum of Understand (MOU) regarding cooperation between the legislative bodies of the two countries after their talks in Riga, Latvia, April 12, 2017. Zhang paid a three-day official visit to Latvia, which ended on Friday. (Xinhua/Li Tao)