Note the new "cold + hot launch" VLS system at work here:
-- The HHQ-9B SAM is "cold launching" where the missile ignites only after clearing the launch tube (first pic). It is ejected out of the tube via an ejection system.
-- The YJ-18 SSM is "hot launching" by igniting its own motor inside of the launch tube (second pic). This hot launching system can launch a missile without the aid of an ejection system as the case of the HHQ-9B