Bao D. Research on the Upgrading and Development of Ski Industry in Heilongjiang Province under the Opportunity of 2022 Beijing Winter Olympic Games. JTPMS [Internet]. 2024 May 31 [cited 2024 Jul. 7];4(05):21-7. Available from: https://centuryscipub.com/index.php/JTPMS/article/view/603