update: complete dataset card

add preview video

add compelling why chingmu section

enrich readme with highlights, format specs, quality assurance

add compelling why chingmu section

update: complete dataset card

add link to Dataset Preview in taxonomy section

update: add request access guidance

add sample files for preview

add first real data entry

add first real data entry

add metadata index csv for filtering

add wechat qr code for full dataset access

update: complete dataset card

fix: correct yaml frontmatter structure

update: full dataset card with taxonomy and usage guide

init: dataset card

initial commit