1. Fees include: ISBN fees, fees paid to authors (royalties or manuscript fees), book editing, design, typesetting, picture copyright fees, printing fees, distribution fees, marketing and publicity fees, etc. However, due to the large number of words in Nihe's novels, the author's manuscript fees and royalties are higher, and the book layout, printing and marketing are better, which leads to the increase in the cost of Nihe's novels.

2. Expected profit refers to the net income that the publishing house expects to obtain by publishing this book (set). The increase in cost squeezed the expected profit space, which led to the rise in the price of Nihe novels.

3. The wholesale price is the price that the publishing house sells books to e-commerce, Xinhua Bookstore System, book wholesalers, bookshop operators and big V with goods, which is the so-called middlemen. The price increase of middlemen further raises the price of Nihe novels.