It seems you're looking for a solid guide related to "Nanjing" in PDF format. However, "solid guide" is not a standard travel guide series (like Lonely Planet, Rough Guides, or DK Eyewitness). You may be referring to a specific guidebook or a comprehensive, well-researched document.
If you are a student, use your university’s JSTOR or Project MUSE access. Many Korean and Chinese medical journals publish annotated excerpts of the Nan Jing that can be saved as PDFs. nan jing pdf
Title: Nan Jing (难经) / The Classic of Difficult Issues Author: Attributed to Bian Que (Qin Yueren), c. 1st or 2nd century CE. Format Analysis: PDF Digital Editions It seems you're looking for a solid guide