Recently, the international comprehensive academic journal Exploration, sponsored by of Henan University, passed the review of academic quality and technical standards of the National Library of America of Medicine (NLM) and was officially indexed in the PubMed Central (PMC), with all published articles collected into the database and granted PMCID numbers.

Exploration was indexed by the DOAJ database in December 2021. And now it has been included in the PMC, an internationally authoritative full-text database on biomedicine and life sciences, which means that the journal has become more authoritative internationally.