Why did Tianjin's logistics stop?

The reason for the shutdown of Tianjin logistics is the epidemic situation. According to relevant public information, Tianjin Express stopped sending due to the epidemic situation. By February 29th, 2022, 65438, the epidemic situation in Tianjin has been well controlled. Personal protection should be done during the epidemic period, wearing masks when going out, washing hands scientifically, not gathering and not going to high-risk areas.