Thank you for the release!
…and yet
another East Asian work that knows nothing about how succession works apart from the foreign dynasties of Ancient China (most of which came from nomadic or semi-nomadic backgrounds, whose social structure is entirely different). It's honestly kind of pathetic how widespread it is, since the native dynasties of East Asia and all of the royal and noble families of Europe have
always used some form of
primogeniture. (This includes the noble and royal families of Korea and Japan, in whose works this trope is most prevalent, so there's really no excuse.) Think about it: in most nations, uncertainty about who the successor is is called a
succession crisis (these usually end in
war); so that means, if the successor is not predetermined you have a
constant succession crisis. Oops, indeed.
(It bothers me every single time. How irksome.)