(1/1) checking keys in keyring [######################] 100%
(1/1) checking package integrity [######################] 100%
error: wps-office: signature from "lilac (build machine) <lilac@build.archlinuxcn.org>" is unknown trust
:: File /var/cache/pacman/pkg/wps-office-10.1.0.5672_a21-2-x86_64.pkg.tar.xz is corrupted (invalid or corrupted package (PGP signature)).
Do you want to delete it? [Y/n] y
error: failed to commit transaction (invalid or corrupted package (PGP signature))
Errors occurred, no packages were upgraded.
解决办法：sudo pacman -S archlinuxcn-keyring
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