Presumably now a mention of the coil we do not feel strange, but it is also said that the end of the thank you. Thanks for the benefits and convenience it brings to us. We may put it before the coil more or less some criticism, say what coil so big point, how much ah. I would like to tell you that in a whole, the role played by a component is not the size of the decision, but the effect of the decision. Just as a person's ability is not how you grow, but what you are in the community, the team and so on to make a record. Coil to promote the development of social order before such as ride, bus is a need for a flight attendant to collect the money. Now, with the sensors, payment by credit card, so there is no need for more human in this. Library canteen meal, campus library, school doctor takeaway payment, payment and so on, a brush can. Bring us a lot of convenience. This is why the coils are so popular.