Liu Jingchao: publicly available information is limited. At present, only one work bearing this author's name is known, namely PostgreSQL Zui Jian Shizhan (The Simplest Practice of PostgreSQL), which is classified under the general category of computer science. From the available information, the writing centres on database technology and addresses readers who wish to approach PostgreSQL with a low entry threshold. The book follows a "simplest practice" approach, emphasising hands-on understanding of installation, configuration and everyday use rather than lengthy theoretical exposition, and presenting operable steps and common scenarios so that beginners can follow along. Because the library holds no record of the author's life, education or professional background, it is not possible to describe research experience or teaching achievements, and no overreaching claims about influence should be made. Overall, this profile can only offer a cautious outline based on the existing work; fuller information would require additional public sources.
