• 米(rice)
• 青(green and pure; clear and clean)

Rice pounded clean and polished becomes pure and clear as the blue-green color of jade.

• 冫(ice; cold)
• 隹(short-tailed bird)

Cold ice water helps measure water level accurately, thus meaning standard, permissible.

• 米(rice)
• 青(green and pure; clear and clean)

Rice pounded clean and polished becomes pure and clear as the blue-green color of jade.

• 冫(ice; cold)
• 隹(short-tailed bird)

Cold ice water helps measure water level accurately, thus meaning standard, permissible.