on september 18, 2015, the limited edition of his autobiography entitled "standing firm at 24" was published, while the standard edition went on sale on october 7. the book documents important events throughout his life and broke several online sales records selling 68,537 copies in the first twenty-four minutes of pre-sale. with less than three months of sale with 1.4 million copies sold, it obtained the fourth place in "the 10th chinese celebrity writers list", released by the influential chinese media, wcc daily, cover news and great star media, becoming in the youngest author to enter the list. he was also the champion of the 2015 annual celebrity book sales, and ranked first in asia's best books, twice during his monthly ranking and six times for the weekly list. he was also on the rakuten list, with 400,000 copies sold within six months, and has received much acclaim and praise from readers.