T plus 7 is not necessarily the eighth day. If it is Saturday or Sunday, then T-Day is Monday. T+7 means that the next trading day is within 7 days. If T Day is Friday, T+ 1 is next Monday. T means today (working day), and T plus 7 means today +7 days. T day is a trading day, but it must be a valid working day before 3 pm on that day (except Saturday, Sunday or legal holidays).

Saturday and Sunday, also known as Labor Day, refer to the length of working hours (hours) of employees in a day and night. Working days are working hours in days. Article 36 of the Labor Law of People's Republic of China (PRC) stipulates: "The state implements a working hour system in which laborers work no more than eight hours a day and no more than forty-four hours a week on average." From 65438+1 May, 19951day, China has generally implemented the working hours system of working five days a week (Monday to Friday) and working eight hours a day.