I use the gem pg_search in rails as a light-weight tool for full-text searching task of Postgres, but Postgres doesn’t support the function well in Mandarin/Chinese. After finding solutions, I take the combination of tools for full-text search in Postgres, which are pg_search gem, SCWS and zhparser. Doing it yourself according content in following links, you will setup successfully too. Remark at 20160131: This tutorial requires postgresql-server-devel-{VERSION} at Ubuntu and