Regarding the leakage issue, we first need to determine the material of the gate. For instance, if it's a cast iron gate, we must inspect the specific leakage location. If the leakage is at the bottom of the cast iron gate, it could be due to the gate not falling into place properly during the opening and closing process, causing silt to accumulate below and lead to leakage. If the leakage is between the gate and the gate frame, a cast iron gate with copper lining can be used, as the inclusion of copper strips will improve the water-stopping effect over a plain cast iron gate. If the leakage is from the gate panel, it indicates that there is a problem with the gate panel itself, which requires contacting the buyer or replacing the panel directly.