Abstract: The present disclosure provides an injection pen needle, which includes a needle head, a needle seat, an outer sleeve, a sliding sleeve and a limit ring, wherein the needle head is arranged on the needle seat; the needle seat comprises baffle plates; the outer sleeve is arranged on the needle seat in a sleeving manner; the lower part of the sliding sleeve enters the outer sleeve and is adapted to move up and down in the outer sleeve, and a channel hole, from which the needle head can penetrate out, is formed in the top of the sliding sleeve; the limit ring is arranged in the outer sleeve; the limit ring comprises sliding blocks; the bottom of the sliding sleeve pushes against the limit ring; and when the sliding sleeve moves up and down in the outer sleeve.

Abstract: A method provides an expression picture in an instant communication conversation window; acquires information of a user operation activity information from a sending user with respect to the expression picture; searching a first expression database based on the expression picture and the acquired information of the user operation activity; generates a first response message corresponding to the expression picture under the user operation activity; and sends found information related to the expression picture and the acquired information of the user operation activity to a receiving client corresponding to a receiving user to facilitate the receiving client to generate a second response message corresponding to the expression picture under the user operation activity.

Abstract: A method provides an expression picture in an instant communication conversation window; acquires information of a user operation activity information from a sending user with respect to the expression picture; searching a first expression database based on the expression picture and the acquired information of the user operation activity; generates a first response message corresponding to the expression picture under the user operation activity; and sends found information related to the expression picture and the acquired information of the user operation activity to a receiving client corresponding to a receiving user to facilitate the receiving client to generate a second response message corresponding to the expression picture under the user operation activity.

Abstract: A method provides an expression picture in an instant communication conversation window; acquires information of a user operation activity information from a sending user with respect to the expression picture; searching a first expression database based on the expression picture and the acquired information of the user operation activity; generates a first response message corresponding to the expression picture under the user operation activity; and sends found information related to the expression picture and the acquired information of the user operation activity to a receiving client corresponding to a receiving user to facilitate the receiving client to generate a second response message corresponding to the expression picture under the user operation activity.

Abstract: A method provides an expression picture in an instant communication conversation window; acquires information of a user operation activity information from a sending user with respect to the expression picture; searching a first expression database based on the expression picture and the acquired information of the user operation activity; generates a first response message corresponding to the expression picture under the user operation activity; and sends found information related to the expression picture and the acquired information of the user operation activity to a receiving client corresponding to a receiving user to facilitate the receiving client to generate a second response message corresponding to the expression picture under the user operation activity.

Abstract: Displaying an application set identifier is disclosed, including: displaying an application set identifier in a designated area of a display screen, wherein the application set identifier is associated with an application set; receiving a notification; determining that the notification is associated with an application related to the application set; and in response to the determination, changing a display of the application set identifier in the designated area to a display of an application identifier associated with the application related to the notification.