I am Pinghao Wu, known on various platforms as xdavidwu, also as wuph0612 at NYCU CSIT. I write open source software sometimes, like wlchewing. I am skilled at TypeScript, PHP and C, familiar with Go, Java, POSIX shell script, Hare, and Python. I am the sysadmin of the whole *.xdavidwu.link infrastrature.