Poland is seeking to host about 15,000 US troops on its territory, with deployment phased to reach that target by 2039, the deputy defense minister said on the 21st. About 4,000–5,000 would be stationed at permanent bases and roughly 10,000–11,000 deployed on rotation. Poland currently hosts about 6,500–7,000 rotating US troops.

China’s Ministry of Industry and Information Technology (MIIT) said it will optimise radio spectrum allocation to drive wireless technology innovation, support the wireless industry and strengthen the industrial base. Speaking at the 2026 China Radio Conference, which opened on the 21st in Xiong'an New Area, Hebei, an MIIT official said the ministry will pursue scientific spectrum planning, precise supply, rational development and efficient use to accelerate construction of a modern industrial system anchored by advanced manufacturing. The ministry also pledged to build innovation platforms to link radio R&D with industrial application; enhance radio governance by improving laws, regulations and standards, expanding monitoring and interference enforcement, and cracking down on illegal spectrum use and unauthorised stations; and deepen international cooperation, including hosting the ITU 2027 World Radiocommunication Conference.

美國上市的與格陵蘭島相關的公司股票美股盤前大幅上漲，Critical Metals(CRML.O)上漲35%，格陵蘭島礦業上漲93.5%。此前美國與丹麥就格陵蘭島達成協議。