For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:Fei1Yang:network/openSUSE_Tumbleweed/home:Fei1Yang:network.repo
zypper refresh
zypper install aria2
For openSUSE Leap 15.2 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:Fei1Yang:network/openSUSE_Leap_15.2/home:Fei1Yang:network.repo
zypper refresh
zypper install aria2
For openSUSE Leap 15.1 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:Fei1Yang:network/openSUSE_Leap_15.1/home:Fei1Yang:network.repo
zypper refresh
zypper install aria2