Member service card. According to the public comment network, according to the Labor newspaper, this card, nicknamed "Little Red Card" by Shanghai employees, is a service card for Shanghai trade union members. By docking with the municipal population office, the municipal social security center and other government departments, the card obtains data information such as population residence, social security payment, social assistance, employment and unemployment, which provides a strong basis for trade unions to carry out accurate services and strengthen work efficiency.