ZAWAY resistance map PDF covering pages or models 6 to 7, 23.5 MB; 阻值图 is Chinese for resistance value diagram. ZAWAY publishes reference sheets showing measured resistance to ground at points on phone logic boards, and the 6-7 range probably refers to iPhone 6 and 7 generations, though the name does not confirm the models. Technicians compare these readings with diode mode or ohm measurements from a faulty board to localise shorts and open lines. Use the same meter mode as the reference for meaningful comparison.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @uzb4422. Enginerys does not host this file.
How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.