Chinese sun and moon mirrors being hung round the neck, or because necks are concave things. Liu An's (c. 139 BCE) "Huainanzi" "Masters of Huainan", which is a compendium of writings from various schools of Chinese philosophy, was the first text to record "fangzhu" dew-collectors. Two "Huainanzi" chapters metaphorically use "sun and moon mirrors" to exemplify "yang" and "yin" categories and elucidate the Chinese notion of "ganying" "cosmic resonance" through which categorically identical things mutually resonate and influence each other. The "yángsuì" 陽燧 "burning-mirror" is "yang", round, and sun-like; the "fāngzhū" 方諸 "square receptacle" is "yin", square, and moon-like. The first context describes "yangsui" and
Green Dot (symbol) obvious links with the Chinese Taijitu (yin and yang) symbol and Gary Anderson's recycling symbol. Where full-color printing is available, its official form is printed in a light and a dark shade of green (Pantone 366C and 343C). For cost reasons or to avoid a visual clash with other symbols, many manufacturers chose a black-and-white or other color combination on their packages. The Green Dot logo merely indicates that a company has joined the Green Dot scheme, and "not" necessarily that the package is fully recyclable. The logo is often confused with the recycling logo. In Malta, Green Dot Malta