1 sentence for 以至于 (yǐ​zhì​yú — up to)

1. 他的书房里到处是书，桌子上、椅子上，以至于地板上。

   tā de shū​fáng lǐ dào​chù shì shū, zhuō​zi shàng, yǐ​zi shàng, yǐ​zhì​yú dì​bǎn shàng.

   There were books everywhere in his study: on the desk, on the chairs, and even on the floor.

   Source: Dong Chinese Dictionary