Here is the situation regarding finding this specific PDF for free:
If the publication is old enough (e.g., pre-1930s in the U.S.), it may be in the public domain. Use the following resources to search legally available archives: lung fu pao magazine pdf free
Since I cannot provide a direct download link to copyrighted material, here are the best search terms to use on Google or Baidu to find a scan: Here is the situation regarding finding this specific
"龙虎豹" "Solid" 乐队 PDF"Hong Kong vintage magazine scan" or "香港舊雜誌掃描".archive.org and search for "Lung Fu Pao" or the specific year/month if you know when Solid was featured.Lung Fu Pao (龙虎豹) was a highly popular Hong Kong adult entertainment and lifestyle magazine. While it is no longer in print, the copyrights to the articles and images are still retained. Chinese Search: "龙虎豹" "Solid" 乐队 PDF Hong Kong
Some major university libraries with East Asian studies departments (such as Harvard, UC Berkeley, or the University of Hawaii) have digitized portions of martial arts periodicals. While they rarely offer full downloads, they provide snippet view or limited preview for free. You can often view 20% of a given issue online without paying.