中国移动：为北京用户免费提供北斗卫星短信服务

Core Points - China Mobile has launched a one-month free Beidou messaging service for users in Beijing to ensure communication during recent heavy rainfall and flooding [1] - The service allows users to send up to 30 messages and receive unlimited messages without network coverage by sending "KTBD" to 10086 [1] - In emergency situations where mobile communication is unavailable, this service can be used to send distress or safety messages [1] - China Mobile has deployed multiple teams to flood-affected areas for rescue operations and has set up drone-based aerial base stations to provide emergency communication services [1]