My hat has one corner

Nón lá or dǒulì or sugegasa or do'un or caping or satgat. The Asian conical hat, commonly known as an Asian rice hat, coolie hat (in the UK) or farmer's hat, is a simple style of conical hat originating in East, South, and Southeast Asia, particularly Bangladesh, Bhutan, China, Cambodia, India, Indonesia, Japan, Korea, Malaysia, Myanmar, Philippines, parts of Russian Manchuria and Vietnam.