How to load asynchronously with ng-zorro tree table?

as mentioned in the question, how to implement tree table to load data asynchronously in ng-zorro.

Mar.04,2022

query the subordinate node when you click to expand, and splice it to the original node

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-64f5-1b314e0-34132.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b314e0-34132.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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