improve add iz
improve add iz

AlanJager/zstack,AlanJinTS/zstack,AlanJinTS/zstack,zstackio/zstack,zstackio/zstack,camilesing/zstack,AlanJinTS/zstack,AlanJager/zstack,zstackorg/zstack,camilesing/zstack,MatheMatrix/zstack,camilesing/zstack,zstackorg/zstack,AlanJager/zstack,MatheMatrix/zstack,zstackio/zstack,MatheMatrix/zstack