https://www.emqx.com/zh/cloud
EMQX Cloud - 全托管的 MQTT 消息云服务
EMQX Cloud 是由 EMQ 提供的全托管 MQTT 5.0 物联网云服务平台，可连接海量物联网设备，实时处理数据。支持按量付费，零代码完成消息分发与持久化。
emqx cloudmqtt
https://aws.amazon.com/marketplace/pp/prodview-o7yybi64xhote
AWS Marketplace: EMQX Cloud (Annual)
Gain access to usage discounts pre-paid annual plan. The easiest way to start MQTT service. Connect your IoT devices to any cloud without the burden of...
aws marketplaceemqx cloudannual