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It’s not java client specific, we could construct bulk insert in one line like:

INSERT VERTEX t2 (name, age) VALUES "13":("n3", 12), "14":("n4", 8);

If batch insert you meant multiple lines, it’s supported, but not recommended as the client will only return the last line of execution result in multi-line query. https://docs.nebula-graph.io/3.2.1/3.ngql-guide/12.vertex-statements/1.insert-vertex/

Got it. Thank you @wey