《汉官仪》：四马载车，此常礼也，惟太守出，则增一马，故称五马。

ballads of four seasons: spring

the lovely lo fo of the western land
plucks mulberry leaves by the waterside.
across the green boughs stretches out her white hand;
in golden sunshine her rosy robe is dyed.
"my silkworms are hungry, i cannot stay.
tarry not with your five-horse cab, i pray."