extra \x22 for fun and profit:

4/4/2018 -- 09:35:46 - <Notice> - This is Suricata version 4.0.4 RELEASE
4/4/2018 -- 09:35:46 - <Info> - CPUs/cores online: 12
4/4/2018 -- 09:35:46 - <Error> - [ERRCODE: SC_ERR_INVALID_SIGNATURE(39)] - error parsing signature "alert ip any any -> any any (msg:"GeoIP from China "; geoip: src, CN; sid:900033; rev:1; priority:4;)"" from file /tmp/test.rules at line 5

VS

4/4/2018 -- 09:37:13 - <Notice> - This is Suricata version 4.1.0-beta1 RELEASE
4/4/2018 -- 09:37:13 - <Info> - CPUs/cores online: 12
4/4/2018 -- 09:37:13 - <Info> - fast output device (regular) initialized: fast.log
4/4/2018 -- 09:37:13 - <Info> - eve-log output device (regular) initialized: eve.json
4/4/2018 -- 09:37:13 - <Info> - stats output device (regular) initialized: stats.log
4/4/2018 -- 09:37:13 - <Error> - [ERRCODE: SC_ERR_INVALID_SIGNATURE(39)] - no terminating ";" found
4/4/2018 -- 09:37:13 - <Error> - [ERRCODE: SC_ERR_INVALID_SIGNATURE(39)] - error parsing signature "alert ip any any -> any any (msg:"GeoIP from China "; geoip: src, CN; sid:900033; rev:1; priority:4;)"" from file /tmp/test.rules at line 5