The researchers analyzed tidal currents at three stations in the East China Sea for 25 hours. They found that the tidal currents in the area are regular semidiurnal, with the north component generally stronger than the east component. The currents rotate clockwise and the shallow water currents are stronger near the surface and middle layers compared to the bottom layer. This study helps understand tidal currents in the East China Sea and can assist in calibrating ocean models. It also provides insights into the relationship between tidal currents and suspended sediment concentration.