Annotates Chinese text with Jyutping readings.
See it in action here https://jftsang.github.io/jyutruby/
Background image by hassified at https://www.deviantart.com/hassified/art/Rice-Paper-Background-Texture-852909149
Wood texture by nortago at https://www.deviantart.com/nortago/art/Bg-Texture-wood-38841113