Small 69.9 KB ZIP whose name points to a 128 KB image with version string DWCN20WW. The WW-suffixed format resembles Lenovo firmware versioning, and a 128 KB size typically suits an embedded controller or small auxiliary flash rather than a main BIOS, though the name does not state the device. Identify the target chip and board before use. Read and save the original chip with your programmer, and ensure the chip capacity matches the 128 KB image so it writes correctly.
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 @vinafix_bios. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.
Built-in OS tools7-Zip