The Taoist Chinese believe that on the 7th month of the lunar calendar,the gate of hades, 鬼门， will open.
For a month, those who passed away tragically due to accidents or murder, can return to see their descendants.
During this period, most parents will warn their children against going to the swimming as they believe there are water spirits, 水鬼，lurking in the water and they are waiting for the next victim to come along to take their place.
Even though most people dismiss it as a superstitious belief, most parents will support this claim as it is always better to be safe than sorry.
I’ve uploaded this video firstly is to prove that water spirits, 水鬼, do exist and also to support the older folks’ advice. Secondly, instead of the victim being pulled down into the water, they could also have been pushed into the water to be drowned.
Watch it for yourself.