mainland China (PRC excluding Hong Kong and Macau, but including islands such as Hainan)

content; substance; details

domestic

inside source; mole; insider

to take medicine orally (as opposed to applying externally)

interior

inner container (e.g. the rice pot inside a rice cooker, the vacuum bottle inside a thermos, the tank inside a hot water heater, the bladder of a football)

within the borders

internal

heart; innermost being

(included) in it

civil war

inside; within

(government) cabinet

inside and outside

indoor

underpants

during the current year

inner

within

meaningful content

(literary) my wife

internal affairs (of a country)

Hanoi, capital of Vietnam