China DOS Union

Question for DOS experts? Thanks, everyone.

I think just deleting it doesn't seem to work. I've tried it too. The best way is to format it.
If you delete it, then use scandisk from 98 and you'll find disk errors.
And all partitions are FAT32

First you have to see whether there are a lot of user programs and data that absolutely must be kept. If not, use FORMAT and cut the Gordian knot!
If so, then as follows:
XP (OR 2000) file format must be FAT32
You also need to see whether it's a single system or a dual system with 98.

If it's a single system, under DOS you can delete all folders and files related to XP OR 2000. If messages like "file not found" "access denied" etc. appear, before deleting use attrib -s -r -h /s to remove system, read-only, and hidden attributes. Also, in DOS, if no long filename (LFN) support program is loaded, folder or file names longer than 8 characters are represented by "the first six characters (ignoring spaces)" plus "~1", and you must type the file extension. Use "del" to delete files, and "deltree" to delete folders.

They are:
Folders:
windows
program files
documents and settings
The following two are on every drive:
system volume information
recycled (in 2000 it is recycler)
Files:
ntldr
boot.ini
ntdetect.com
bootfont.bin
pagefile.sys
Also some related .txt and .log files
Do not delete application programs and data files unrelated to the system.
After that, reboot and you can install a new operating system. But you will need to reinstall applications.

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If it is a dual system with 98:
You need to keep these under the system directory:
ntldr
boot.ini (if you don't want the dual-boot menu to appear and want to enter 98 directly, you can change default= to the 98 one, and change timeout=xx to 0)
bootsect.dos
io.sys
msdos.sys
config.sys
command.com
autoexec.bat
Then you can go straight into 98.

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If you still want to wipe out the three files ntldr boot.ini bootsect.dos, that's also possible, but it's a bit risky. It's best to rename them first, then use debug to write bootsect.dos into the system boot sector, as follows:
debug
-nc:\bootsect.dos
-l 0
-w 0 2 0 1
-q
This writes bootsect.dos into the system boot sector. Reboot and try it; if the system can enter, then you can delete those three files.
If not, just change the three filenames back.
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Multi-system setups are more or less the same.

Back when I deleted WIN2000, I just did FORMAT C:, simple and fast. No future trouble! No need to worry about junk left behind by the old system causing interference.

Bump, really very useful
Many thanks to the OP

Mine is a dual system, not easy to delete.

A dual system should be the same, right? Use DELTREE -y D:\XXXXX to delete the entire WIN2000 folder, then boot once with a WIN98 boot disk and run SYS C：, that should do it.

If it's a dual system with 98, deleting it in 98 is simple. But the OP's requirement is to delete it in DOS, so then you have to use the DOS method.

If they're important Chinese files, then how should they be taken out?

Even without loading Chinese translation software, there is still a way.
You can first type "DIR 英文目录 > xxx.txt"(to find the Chinese files you want, while redirecting to the specified file), then edit it (keep the garbled path, filename, and extension, and add the COPY command; delete everything else, then rename xxx.txt to xxx.bat, and run it)