Lo-shu is a magic square in which the sum of the three numbers will be 15-row wise,column wise and diagonally.It is ancient chinese phenomenon in which man's interaction with the five elements such as Earth, Water, Fire, Wood and Metal is analysed. In Lo-shu the birth date is the key factor based on which the impact of the five natural elements on the concerned person is studied.Each metal is associated with a particular number.Each digit in the persons birth date is associated with the corresponding element and the missing factor is known.