I. i according to china internet development statistics report published by cnnic (china internet network information center), china has 989 million internet user, and the internet penetration rate is 70.4% at the end of 2020. currently, the number of instant messaging user reached 980 million and the number of online shopping users reached 782million in china. with the expanding of the scale of online shopping market, the number of online reviews is increasing rapidly in the same time. estimating reviews ’ information quality is provided with important practical value for rising sales and retaining customers for e-commerce platforms and the venders. online shopping has replaced physical store shopping to a certain extent for its advantages in convenient shopping, low price and full range of products. it has become one of the irreplaceable shopping modes in today`s information society. compared with traditional shopping method, online shopping possesses some irreplaceable advantages. in the meantime, there are still some uncertainties to be reckoned with in the online shopping. because of the using convenience of internet technology, consumers often refer to third-party platforms on buyers reviews and commodity quality while they are online shopping. on the other hand, the buyer actually may not get the live experience on internet, and that becomes one