This is called shiso, or also known as oba, and yes.

这叫，叫作 oba，是的。

Whatever was significant, the oba would tell the guild of bronze casters to cast it in bronze, to keep a record.

无论何事具有重要意义， 国王都吩咐青铜铸造其铸成青铜，以作记录保存。