Fatal error: Uncaught exception Exception with message Could not connect to database (由于连接方在一段时间后没有正确答复或连接的主机没有反应，连接尝试失败。
) thrown in C:\wwwroot\yonpshcn\web\system\libraries\Database.php on line 155
#0 C:\wwwroot\yonpshcn\web\system\libraries\Database.php(271): Database->__construct()
#1 [internal function]: Database::getInstance()
#2 C:\wwwroot\yonpshcn\web\system\libraries\System.php(293): call_user_func(Array)
#3 C:\wwwroot\yonpshcn\web\system\libraries\Model.php(171): System->import('Database')
#4 C:\wwwroot\yonpshcn\web\system\modules\frontend\FrontendUser.php(181): Model->__construct()
#5 C:\wwwroot\yonpshcn\web\system\modules\frontend\FrontendUser.php(345): FrontendUser->__construct()
#6 [internal function]: FrontendUser::getInstance()
#7 C:\wwwroot\yonpshcn\web\system\libraries\System.php(293): call_user_func(Array)
#8 C:\wwwroot\yonpshcn\web\index.php(117): System->import('FrontendUser', 'User')
#9 C:\wwwroot\yonpshcn\web\index.php(663): Index->__construct()
#10 {main}