[走后门 / 走後門, zǒu hòu ménㄗㄡˇ ㄏㄡˋ ㄇㄣˊ] lit. to enter by the back door; fig. to gain influence by pull or unofficial channels; back door or under the counter connections#44371
[走内线 / 走內線, zǒu nèi xiànㄗㄡˇ ㄋㄟˋ ㄒㄧㄢˋ] insider contacts; via private channels; to seek influence with sb via family members (possibly dishonest or underhand)#387203