Abstract: Provided are Enterococcus lactis, a drug for preventing or treating tumor, and use thereof, relating to the technical field of biomedicines. Novel Enterococcus lactis is separated and chosen, and the Enterococcus lactis has an important influence on the effect of tumor immunotherapy for cancer patients. Gut microorganisms and immune cells can interact with each other to jointly regulate the human immune system. The provided Enterococcus lactis can induce the differentiation and maturation of iDC (immature DC) cells, and mature DC can effectively activate T cells and increase the infiltration of tumor infiltrating lymphocytes having anti-tumor activity, thereby killing tumor cells. In addition, the provided Enterococcus lactis can induce the differentiation of M0 type macrophages into M1 or M2 type cells.

Abstract: One or more example embodiments of the present invention relates to a breast fixation element for a mammography system having a flat elastic surface element including a fastening element for fixing the breast to a support surface of the mammography system, wherein a shape of the breast fixation element is adapted to a shape of the breast.

Abstract: Methods, devices, and systems for processing contact information are provided. A request for generating virtual contact information can be received from a terminal. According to the request for generating virtual contact information, real contact information that is preset can be obtained. According to the real contact information, the virtual contact information can be generated. The virtual contact information can be sent to the terminal for a user to use.

Abstract: A method is provided for user authentication. The method includes receiving an authentication request sent from a business system for authenticating a user, obtaining operation scenario information and operation basic elements, and displaying the operation scenario information and the operation basic elements. The method also includes receiving authentication information and the operation basic elements. Further, the method includes authenticating an identity of the user based on the received authentication information. The method includes obtaining an authentication result and sending the authentication result to the business system.