For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:szw0407/openSUSE_Tumbleweed/home:szw0407.repo
zypper refresh
zypper install wps-office
For openSUSE Slowroll run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:szw0407/openSUSE_Slowroll/home:szw0407.repo
zypper refresh
zypper install wps-office
For 15.6 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:szw0407/15.6/home:szw0407.repo
zypper refresh
zypper install wps-office
For 15.5 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:szw0407/15.5/home:szw0407.repo
zypper refresh
zypper install wps-office
For 15.4 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:szw0407/15.4/home:szw0407.repo
zypper refresh
zypper install wps-office