Yin Collection, Lower Volume Radical: Wide (guǎng) Entry: Tu Kangxi strokes: 15 Page 350, Entry 23 According to the Extensive Rhymes (Guangyun) and the Collected Rhymes (Jiyun), it is pronounced tu. According to the Extensive Refinement (Guangya), tu is a thatched hut. Furthermore, according to the Collected Rhymes (Jiyun), a flat roof is called tu. The Collected Rhymes (Jiyun) also notes that it is sometimes written in a variant form.