# 测试函数
def test_conversion_functions():
    # 测试 conversion_province_to_chinese 函数
    assert conversion_province_to_chinese('Jiangsu') == '江苏'
    assert conversion_province_to_chinese('Zhejiang') == '浙江'
    assert conversion_province_to_chinese('Unknown Province') == ''

    # 测试 conversion_region_to_chinese 函数
    assert conversion_region_to_chinese(('CN', 'Jiangsu', 'Nanjing')) == '中国大陆 江苏 南京'
    assert conversion_region_to_chinese(('Germany', 'Bavaria', 'Munich')) == 'Germany Bavaria Munich'
    assert conversion_region_to_chinese(('CN', '', '')) == '中国大陆'

if __name__ == "__main__":
    test_conversion_functions()
    print("PASS")