SEOUL - Cho Chul-hyeon, who penned a book on Party General Secretary Nguyễn Phú Trọng published in the Republic of Korea (RoK) in May, said he was deeply saddened by the passing of the Vietnamese Party chief. Its Vietnamese version is being compiled by the Việt Nam News Agency (VNA)’s Publishing House and expected to be made public soon. As the top leader, General Secretary Trong worked hard to attract foreign investors and promote Việt Nam as a country of democracy and high economic growth for years. Cho said that the General Secretary remained steadfast in his policy of expanding international cooperation and strengthening integration. Regarding his book on the Party leader, Cho said it highlights the legacy of the General Secretary, stressing not only young Vietnamese but also people worldwide should follow his example.