Possessing rich experience in sales, brand positioning and product marketing. David Yan is the first one to put forward the concept of Pre-marketing among the advertising circle in China. He suggests No Pre-Sales, No Sales; and No Pre-Marketing, No Marketing. Pre-marketing model integrates four layers of consumer communication (difference、arrival, depth, relation) with AISAS model. It helps brand builders find the blind area during building their brands in mobile social time. Though some products are good enough, consumers have no brand positioning in mind. Thus, do not complain that marketing is not in place if the potential consumers do not give their preference to your products during their selection. How could it be? The answer is you ignore the front part of the work of marketing chain. If the front part is done well, all things will go smoothly and easy to push.