Among the 1,425 e-book websites in China, original websites account for only 4.49%. Serious piracy problems have caused the domestic e-book market to be slow to enter the rapid development stage, and its sales revenue is far from being comparable to the traditional paper book market. From this you can infer (). ['By solving the problem of piracy, the domestic e-book market can develop rapidly.', 'The original website also has piracy issues.', 'The number of e-book sites must be reduced to promote the development of the e-book market.', 'The domestic e-book market is far from mature.']