In a word, there is no standard at all. As long as someone posts a book review (even if it's an advertisement), I give the essence, first post, first served, until the essence of the week shines. If there are pertinent comments and words of encouragement (criticism is fine, as long as there is no random scolding or personal attack), it will be given to the top according to the situation. As for the book review reward, it is generally given to the first one (if there is an incisive and pertinent one within 24 hours, it can be given as appropriate). Anyway, that's it.