Three.js gets the position location information of the sub-model in the Group.children of the imported model

Click to get one of the children Mesh objects under a Group, but the position of the object is {0Power0ZO}
the coordinates obtained through the getWorldPosition of the child object are the coordinates of the parent Group

how do I get the position of the child object relative to the parent and the position position in the entire world coordinate system

Jun.15,2022
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1e99d36-178d.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1e99d36-178d.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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