Update UG and DG

[codecov[bot]]

Codecov Report

Merging #235 (1ba18c5) into master (d6d5cec) will not change coverage. The diff coverage is n/a.

@@            Coverage Diff            @@
##             master     #235   +/-   ##
=========================================
  Coverage     79.87%   79.87%           
  Complexity      790      790           
=========================================
  Files           111      111           
  Lines          2519     2519           
  Branches        269      269           
=========================================
  Hits           2012     2012           
  Misses          419      419           
  Partials         88       88           

:mega: Codecov offers a browser extension for seamless coverage viewing on GitHub. Try it in Chrome or Firefox today!

[kohkaijie]

need fix checkstyle issues