Recently, I had to work at the scene of the customer's company, did some testing and tuning work. I dislike the customers, in other words I hate them because they know nothing but changing the requirement frequently. Nobody is willing to think and research what on earth they need or want. They can change everything except the deadline of projects. They have the right to assign us various tasks anytime anywhere as long as they want because they are gods, they regard themselves as our masters. Their motto is "We give you money, so we are your masters, you must serve us without any condition. No rule, no regulation but our words and orders"