Some oil extraction plants use the decolorization method, leaving a small amount of harmful substances like benzene in soybean oil.use bean oil to make dumplings.Using raw soybean oil for filling is unscientific; before mixing it into the filling, the oil must be heated until its temperature exceeds 200℃ to volatilize harmful substances. Let it cool down, then use this cooked oil for the filling to ensure safety and lack of harm.