The development of law is affected by certain external factors, such as social, political, technological, economic, and so forth. With the acceleration of globalisation, world economy plays an increasingly significant role. Accordingly, prices, as the basic element of free-market economy, attract much more attention, especially when the price evidently changed after the conclusion of the contract. This put a good deal of stress on contract law and demanded a solution.

Chenjing Jiao is a Chinese lawyer from Shanghai and works as Brand Protection Supervisor for the WD-40 Company. She studied law at the Jilin University in Changchun (China) and the University of York (UK).