关于“为什么登录不了广发”的问题，可能有多种原因。以下是一些可能的解释和解决方案。

首先，可能是用户名或密码输入错误。请检查您输入的用户名和密码是否正确。如果忘记了密码，可以尝试找回密码。

其次，可能是网络问题。请检查您的网络连接是否正常，尝试切换到其他网络环境再尝试登录。

另外，也有可能是广发系统维护或者升级，导致暂时无法登录。在这种情况下，您需要等待系统维护或升级完成后再尝试登录。

此外，还可能是由于您在广发所留的信息有误，如手机号码、身份证信息等，导致无法正常登录。这时，您需要尽快联系广发客服进行更正。

总的来说，如果遇到无法登录广发的情况，首先需要确定具体原因，然后根据不同情况采取相应的解决措施。同时，也建议定期备份账号信息和密码，以避免因忘记密码或用户名而无法登录的情况发生。

相对应的英文解释如下：

Firstly, it may be due to incorrect username or password input. Please check whether the username and password you input are correct. If you forget your password, you can try to retrieve it.

Secondly, it may be caused by network issues. Please check your network connection and try switching to other network environments before trying to log in again.

In addition, it may also be due to Guangfa's system maintenance or upgrade, which temporarily prevents you from logging in. In this case, you need to wait for the system maintenance or upgrade to complete before trying to log in again.

Moreover, it may also be caused by incorrect information you have left with Guangfa, such as mobile phone number or ID information, which prevents you from logging in normally. In this case, you need to contact Guangfa customer service as soon as possible for correction.

In general, if you encounter problems logging in to Guangfa, you first need to determine the specific reason, and then take corresponding measures according to different situations. At the same time, it is also recommended to regularly back up your account information and passwords to avoid situations where you cannot log in due to forgotten passwords or usernames.