Sichuan sausages 四川腊肠 (sì chuān là cháng) come in various forms. Most are pork, but they also do beef*. Sichuan sausages tend to be less fatty than their Cantonese counterparts and are laced with chili in various strengths, giving them a distinct red appearance. Generally speaking the darker they get, the spicier.. The also often contain Sichuan peppercorns.
Not for the faint hearted.
* As often as not, the 'beef' sausages are actualy water buffalo or even yak meat.