Qt 6.5.3 QByteArray in MySQL BLOB encoded as if UTF-8

QSqlDatabase database(QSqlDatabase::addDatabase("QMYSQL", "TEST"));    database.setUserName("");
    database.setPassword("");
    database.setPort(3306);
    database.setHostName("");
    database.setDatabaseName("");    QString sql = "insert into sem_image_info (image_format, width, height, image_info, image_data)"
                  " values (? ,? ,? ,?, ?)";    if (!database.open()) {
        qDebug() << "open fail";
        return 0;
    }
    QFile file(
        "");
    if (!file.open(QIODevice::ReadOnly)) {
        qDebug() << "open fail";
        return 0;
    }
    QByteArray array = file.readAll();
    file.close();    QSqlQuery query = database.exec(sql);
    query.bindValue(0, 4);
    query.bindValue(1, 512);
    query.bindValue(2, 512);
    query.bindValue(3, "");
    query.bindValue(4, array);
    if (!query.exec()) {
        qDebug() << "save fail";
        return 0;
    }
    database.close(); 

//SQL:
CREATE TABLE `image_info` (
  `id` bigint unsigned NOT NULL AUTO_INCREMENT COMMENT '',
  `width` int NOT NULL COMMENT '',
  `height` int NOT NULL COMMENT '',
  `image_format` int NOT NULL COMMENT 'QImage Enum format',
  `image_info` mediumtext COLLATE utf8mb4_general_ci COMMENT 'extra info',
  `image_data` longblob COMMENT 'bin data',
  `create_time` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '',
  `edit_time` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '',
  `deleted` tinyint NOT NULL DEFAULT '0' COMMENT '1 - deleted',
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=5 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci COMMENT='';