License
  
    - Tang Shi San Bai Shou [300 Tang Poems] is a compilation of poems from the Tang period (618-907) made around
      1763 by Heng-tang-tui-shi [Sun Zhu] of the Qing dynasty.
 
    - The background muisc 漁舟唱晚 was composed by the zither player Yu Shuhua in the mid-1930s, according to the
      material of the ancient song 歸去來兮辭.
 
    - Stratkat and Epic Battle Fantasy III musics from The Open Game Art
        Bundle, is licensed by Creative Commons Zero
        License.
 
    - Unique images and icons are licensed from Chang Design Lab.
 
    - Some icons made by Freepik and smalllikeart from www.flaticon.com are licensed by Creative Commons BY 3.0.
 
    - Stroke-order vector graphics handling code based on Hanzi, is
      licensed by MIT License.
 
    - Graphical data of chinese characters derived from Arphic PL UKai, is licensed by the Arphic Public License.