What lies behind the "pay-for-knowledge" boom？ Have you ever paid for educational live videos？Ask a woman on the street and the chances are that she will say yes．These years has seen China's ride on the peak of a trend-"pay-for-knowledge"，a new economy that is popular in its prosperity．The content of its products ranges from economics，psychology，and finance to skills of talking，body-building，and baby-caring．
    Then what accounts for this craze on "knowledge"？First of all，the Internet serves as a precondition．Compared with traditional business models，online business has removed the barriers．With a fast network and a smartphone，anyone having passed the identity check upon online platforms can apply to be an online teacher，and anyone with an online account can pay for "knowledge products，he/she wants at an affordable price．Meanwhile，in this age of information，a fear of missing out is generated by information explosion．On one hand，there is ever more desire for focused information that is useful and relevant．On the other hand，such information is usually at the hands of professionals and experts serving well-known companies and schools with high walls．
    Admittedly，this "knowledge-based" payment fashion has proved to be profitable．With regard to the whole society，information is motivated to flow relatively free and，to some extent，complete control of information is broken．Besides，as a new industry，this economy insert vigor （活力）into the development of our country．Sellers can reap rich profits from it；buyers can enjoy self-growth and a broader horizon．Plus，this is also a reflection of respect for knowledge and talents．It promises possibilities of turning information into income．
    As with all the new industry，however，the "pay-for-knowledge" boom betrays a few problems．For one thing，the market is full of exaggerated slogans，which sound like once you pay for it，you are sure to succeed immediately．Also，most "knowledge" products cannot be counted as knowledge at all．For another，a number of consumers believe such nonsense and buy them just for showing off．It is a pity for them not to understand that in essence，to digest knowledge-based commodities requires a long-term investment of time and energy，as well as the ability to learn by oneself．
    On balance，the best is the one that suits you best．Knowledge-based payment should be used as a good start for individual exploration rather than a clutch at straws to save your life．Be careful．Otherwise，great expectation may turn out to be daydreams．

Passage outline	Supporting details
General introduction	♦"Pay-for-knowledge" refers to a new economy which is now enjoying（1） popularity popularity and prosperity in China． ♦ The content of its products （2） covers/involves covers/involves many areas of our life．
（3） Reasons Reasons for the craze	♦The fast network and smartphone make it possible for people to get（4） involved involved in online business． ♦ People are afraid to miss the information that is useful and relevant．
（5） Benefits/profits Benefits/profits	♦People are relatively free to（6） share share A information with others． ♦This economy can（7） promote/encourage/enhance promote/encourage/enhance the development of our country． ♦It reflects people's respect for knowledge and talents．
problems	♦The market doesn't always provide（8） exact/true/practical/reliable/trustworthy exact/true/practical/reliable/trustworthy information，which may mislead consumers． ♦A number of consumers buy the products blindly．Actually，they can hardly invest so much time and energy to digest，and they （9） lack lack the ability to learn by themselves．
conclusion	People shouldn't（10） expect expect too much from knowledge-based payment and the best is the one that suits you best．