跪 足+危 Foot+Danger=KNEEL.
规矩 guiju guiding rules; compass规 on the left, giant巨 yardstick矩 on the right which measures things straight and true as an arrow矢
礼仪 liyi literally rites(person kneeling乚 in front of an 示=altar) + personal亻 justice义
礼貌 limao lit. rites and personal appearance, more exactly the appearance of a person who is Bright白 and shining as a Worshipful Brother 兄
长幼有序 zhang3 you2 you3 xu2 “Age before beauty” i.e. elders first, the idea of filial piety expressed as a cheng yu.
礼上往来 li shang wang lai = reciprocate manners