What does moral decay mean?

Sangzhantian

Explanation:

Mourning: mourning; Tian Liang: Conscience. No conscience. Describe malice to the extreme.

Source:

Qian Qing Yong's "Garden, Presumption and Self-interest": "Today's people are both rich and arrogant, but also unscrupulous."

Example:

Now our government is killing them, so they come to my house to hide for a few days. (Ouyang Shan's "Sanjiaxiang" 26)