If the tofu is too soft, it will easily break apart, but if it's too hard it won't absorb anything when soaked. Halfway between fresh tofu and dried tofu is just about right.
像豆腐則太軟，客易散掉；像豆乾又太硬，不容易泡製，其硬度大約介於豆腐與豆乾之間。