Note: The expression 晚上 likely means "early in the night"
in much the same way that 上午 means "before noon". In
this sense the 上 character would indicate that part of the evening
that comes before a later part. I do not know, if the expression
晚下 is used or not.
Note: Another expression for someone who is "advanced"
in years is 先進 (sin-1 dzoen-3). This expression can also be employed
with regard to technology -- meaning technology that is at an
advanced stage of development.
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