System: As an API testing assistant, analyze API specifications and previous test results to generate new, unused parameters. Avoid using any parameters from the previous attempts. Return only the parameter dictionary.
User: API Specification:
URL: https://cn.apihz.cn/api/ewm/api.php
Method: GET
Required Parameters: [{'name': 'id', 'type': 'string', 'description': '接口盒子提供的唯一标识符', 'default': '88888888'}, {'name': 'key', 'type': 'string', 'description': '接口盒子提供的密钥', 'default': '88888888'}]
Optional Parameters: [{'name': 'text', 'type': 'string', 'description': '要生成二维码的内容，例如网址或文本', 'default': 'https://www.baidu.com/'}, {'name': 'level', 'type': 'int', 'description': '二维码纠错等级，范围从1到10，数字越大纠错能力越强', 'default': '5'}, {'name': 'size', 'type': 'int', 'description': '二维码的大小，以像素为单位', 'default': '10'}, {'name': 'bjcolour', 'type': 'string', 'description': '背景颜色，以十六进制颜色代码表示', 'default': '#ffffff'}, {'name': 'xscolour', 'type': 'string', 'description': '前景颜色，以十六进制颜色代码表示', 'default': '#000000'}]
Previous attempts: Initial Attempt 1:
Parameters: {'id': '99999999', 'key': '77777777', 'text': 'https://www.example.com/', 'level': 7, 'size': 12, 'bjcolour': '#ff0000', 'xscolour': '#00ff00'}
Result: Success
Analysis: Success - parameters worked well

Initial Attempt 2:
Parameters: {'id': '12345678', 'key': 'abcdef12', 'text': 'https://www.openai.com/', 'level': 9, 'size': 15, 'bjcolour': '#0000ff', 'xscolour': '#ffff00'}
Result: Success
Analysis: Success - parameters worked well

Recent Attempt 3:
Parameters: {'id': '88888888', 'key': '88888888', 'text': 'https://www.example.net/', 'level': 8, 'size': 11, 'bjcolour': '#cccccc', 'xscolour': '#123456'}
Result: Success
Analysis: Success - parameters worked well

Recent Attempt 4:
Parameters: {'id': '23456789', 'key': 'mnopqr56', 'text': 'https://www.newsite.com/', 'level': 4, 'size': 13, 'bjcolour': '#e0e0e0', 'xscolour': '#ff5733'}
Result: Success
Analysis: Success - parameters worked well

Recent Attempt 5:
Parameters: {'id': '34567890', 'key': 'qrstuv78', 'text': 'https://www.anotherexample.com/', 'level': 5, 'size': 10, 'bjcolour': '#abcdef', 'xscolour': '#123456'}
Result: Success
Analysis: Success - parameters worked well

Already used parameters: - {'bjcolour': '#abcdef', 'id': '34567890', 'key': 'qrstuv78', 'level': '5', 'size': '10', 'text': 'https://www.anotherexample.com/', 'xscolour': '#123456'}
- {'bjcolour': '#0000ff', 'id': '12345678', 'key': 'abcdef12', 'level': '9', 'size': '15', 'text': 'https://www.openai.com/', 'xscolour': '#ffff00'}
- {'bjcolour': '#ff0000', 'id': '99999999', 'key': '77777777', 'level': '7', 'size': '12', 'text': 'https://www.example.com/', 'xscolour': '#00ff00'}
- {'bjcolour': '#cccccc', 'id': '88888888', 'key': '88888888', 'level': '8', 'size': '11', 'text': 'https://www.example.net/', 'xscolour': '#123456'}
- {'bjcolour': '#fffff0', 'id': '45678901', 'key': 'ghijkl34', 'level': '6', 'size': '14', 'text': 'https://www.example.org/', 'xscolour': '#ff00ff'}
- {'bjcolour': '#e0e0e0', 'id': '23456789', 'key': 'mnopqr56', 'level': '4', 'size': '13', 'text': 'https://www.newsite.com/', 'xscolour': '#ff5733'}

Rules:
1. If required_parameters is empty and you choose not to use optional parameters, return empty dict.
2. If using optional parameters, only use parameters exactly as defined in optional_parameters.
3. Do not create new parameters that are not in the specification.

Generate valid parameters:
Assistant: