answer:Wouldn’t googling have been easier than going through the question process here…? The character for yin is 陰 and it means ‘shade’ or ‘shadow’ or even ‘background’ and can refer more broadly to an unseen place. The character for yang is 陽 and it means ‘sun’ or ‘light’ and can refer to an open place. This is from my knowledge of Japanese but there is probably little variation in Chinese. Maybe someone can confirm. Don’t be lazy.