整理：俄乌冲突最新24小时局势跟踪（6月21日）

Core Insights - Ukraine's President Zelensky has imposed sanctions on companies involved in the production of Russian drones [1] - Russian President Putin stated that Russia does not rule out attempts to occupy the Sumy region, emphasizing that the situation in Ukraine is different from that in Iran, as Russia does not seek Ukraine's surrender [1] - The Russian Ministry of Defense reported that Russian armed forces have "liberated" the town of Moskalky in the Kharkiv region, claiming to have "liberated" six settlements within a week [1] - The Kremlin indicated that dialogue with Ukraine is ongoing, expecting to agree on the date for the next round of talks next week, while refusing to predict the possibility of a meeting between Trump and Putin this year [1]