Daily Chinese Idiom Guessing Game
Describes something that is methodically arranged or organized in good order.
井然整齐不乱的样子。序次序。整整齐齐，次序分明，条理清楚。
清·王夫之《夕堂永日绪论外编》第二十六卷如尤公瑛《寡人之于国也》章文，以制产、重农、救荒分三事……井然有序。”
The library shelves were arranged in an orderly manner, with every book in its place.