2016 Cadillac CT6 inside a fish tankPutting the luxury Cadillac in a fish tank in china for supporting the protection of the environment in the middle of a Chinese shopping district attracted a lot of attention.Cadillac Company decided to advertise its luxury sedan in an unconventional way. That is, by putting the Caddy in a fish tank in the middle of a Chinese shopping district. The company wanted the people to check the car for a month. It said if the water penetrated into the car they refuse buying that.Cadillac in 2010 recorded a sale of more than 150 thousand of Luxury cars in America.