In traditional Chinese society, there is a saying of "meng ying 命硬". It literally means as "hard or rough destiny".
For examples, after someone has married, his or her spouse died unexpectedly soon after OR a new baby was born and his parents soon suffered major misfortune or even death. Consequently, this person or baby lives a miserable and lonely life. People may comment the person or baby involved as "meng ying". This implicitly accuses the person and baby "jinxing" their close relatives and themselves.
Another scenario would be: you may find some old people survive through wars, famines, severe illness/ injuries and misfortune, their family members are mostly dead, yet they still are alive but alone and may be even in destitute. Due to improvement of social welfare in modern societies, a modern version would be the same old people survive alone in institutions when all or most of their family members have died.
A more colloquial use of "meng ying" is to describe someone who escapes major disaster like being the the lone survivor of an airplane crash or battalion during wartime.
Strictly speaking, there is no such thing as "meng ying" in Bazi. The closest concept to "meng ying" is "strong daymaster with no support 身旺无依". This means a chart has a very strong daymaster (DM) with no wealth and power stars to drain it (but failing to become a special profile chart). This chart type usually associated with monk/nun/ Daoist or clergy people in traditional society and poor/ destitute people in modern society
CHARACTERISTICS OF "ROUGH DESTINY" CHART
1. The daymaster has relatively indomitable survival ability or "unsinkable"-- hard to die. S/he suffers frequent setbacks and misfortunes, but s/he usually can overcome or escape from death in catastrophes.
2. It implies "jinx", especially "loneliness jinx", jinxing self, parents and family members. DM is also likely a loner in nature. The "loneliness" here refers to the lacking of family relationship because DM's family members are either dead or separated.
There are two types of "rough destiny":
a. Solitary rough destiny (孤独命硬): This is the "strong daymaster with no support 身旺无依" type mentioned above. Summary meaning is: being poor and alone and likely with longevity.
b. Prosperous rough destiny (富贵命硬): This also has a strong DM chart but with good structure and/ or favorable luck periods. DM is alone eventually (jinxing family members) but s/he enjoys wealth and fame/ power with big ups and down in life. China's late Chairman Mao is an example of this type.
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