In 2022, the second-level constructor examination textbook was listed in June 2022. China Building Industry Press designated a publishing house for the teaching materials of Erjian, and invited candidates to buy genuine books. The cover of the genuine book is special anti-counterfeiting paper, and the words "China Construction Industry Publishing" and the watermark of the social emblem pattern can be seen through the light; Pirated books generally have no anti-counterfeiting paper, or no anti-counterfeiting watermark, or directly copy the effect of anti-counterfeiting paper.