Hi,
Assuming that the asterisk (*) indicates any value.
The first one matches all routes with the /24 mask. That is *.*.*.*/24
The second one matches all routes between mask/24 and /32. That is *.*.*.*/24-32
The third one matches the route with the first 24 bits being 0.0.0 and the last 8 bits being random. That is 0.0.0.*/24 (0.0.0.1 to 0.0.0.255)
For details about the parameters in the command, see the product documentation.
https://support.huawei.com/hedex/hdx.do?docid=EDOC1100007335&id=ip_ip-prefix&lang=en
Any further questions, let us know!