• 馬(horse (pictographic))

The character 馬 depicts a horse with a mane, body, and four hooves running swiftly.

• 白(white; bright)
• 儿(person; human foot)

A hat covering the head protects the white face of a person and shields the entire body.

• 釒(metal)
• 令(order; command)

A metal bell vibrating rings out like a resonant command.

• 酉(wine vessel; ferment)
• 夋(slow manner; leisurely pace)

Fermenting alcohol produces sourness, which is exactly the character for sour.

• 馬(horse (pictographic))

The character 馬 depicts a horse with a mane, body, and four hooves running swiftly.

• 白(white; bright)
• 儿(person; human foot)

A hat covering the head protects the white face of a person and shields the entire body.

• 釒(metal)
• 令(order; command)

A metal bell vibrating rings out like a resonant command.

• 酉(wine vessel; ferment)
• 夋(slow manner; leisurely pace)

Fermenting alcohol produces sourness, which is exactly the character for sour.