p1 = 'c:/NeoZQYY/scripts/ops/txt/progress_p1.txt'
p2 = 'c:/NeoZQYY/scripts/ops/txt/progress_p2.txt'
p3 = 'c:/NeoZQYY/scripts/ops/txt/progress_p3.txt'
out = 'c:/NeoZQYY/docs/h5_ui/compare/PROGRESS.md'
parts = []
for p in [p1, p2, p3]:
    with open(p, 'rb') as f:
        parts.append(f.read().decode('utf-8'))
result = ''.join(parts)
with open(out, 'wb') as f:
    f.write(result.encode('utf-8'))
print(f'Written {len(result)} chars, {result.count(chr(10))} lines to {out}')