Cylinder work volume refers to the volume of gas swept by the piston from the top to the bottom, also known as single cylinder displacement, depending on the cylinder diameter and the piston stroke. Engine displacement is the total volume of working volume of each cylinder, usually expressed in milliliter (CC). Engine displacement is one of the most important structural parameters. It is more representative of engine size than cylinder diameter and cylinder number, and many indicators of engine are closely related to displacement. However, smaller, yet unestablished, Banks are still keen to attract new businesses, such as the recent announcement of Atom Bank, a multi-million dollar mobile provider for investors. Keynes argued that savings and investment were two interdependent variables, not two independent variables. As hicks income concept did not specify what is called "equal wealth", and thus the income concept formed the basis of many debates concept, and the theory of accounting earnings, especially the capital preservation theory has a great influence. In accounting, people used to call "maintaining the same level of affluence" as capital preservation. Compared with the Internet boom that preceded the information age, the blockchain era is almost as hot as it was in 1998, and the cryptocurrency world is inviting mainstream participation.