Beijing, July 21 -- Authorities of Dezhou city, a manufacturing powerhouse in China's Shandong province, have put Vietnam squarely on their expansion radar, drawn by its improving investment climate and surging demand for industry, infrastructure and green transition. Modern agriculture, new energy, manufacturing, environment protection and urban development have been flagged as the most promising battlegrounds for future deals. Tan Mingming, Deputy Director of the Foreign Affairs Office of the Dezhou Municipal People's Government, told Vietnam News Agency reporters that the city has spent years deliberately tightening its links with the Association of Southeast Asian Nations (ASEAN), with Vietnam seen as a key partner. She said Vietnam d...