A terminal device is disclosed, including a first receiving component, an initiating component, a first acquiring component, a determining component, and a first sending component. The first receiving component is configured to receive a connection indication from a base station. The connection indication includes a target connection mode when the terminal is in a non-standalone (NSA) network. The initiating component is configured to initiate a preset service monitoring function when the target connection mode is a preset time-sharing connection mode. The first acquiring component is configured to acquire a current service type. According to the current service type, the determining component is configured to determine a target network mode which is one of multiple network modes in the NSA network. The first sending component is configured to transmit the target network mode to the base station for connection with the target network mode in response to the connection indication.