Fix several bugs related to Guests

Signed-off-by: Takashiro <takashiro@qq.com>
Remove useless lines

Signed-off-by: Takashiro <takashiro@qq.com>
Fix adventure messages

Signed-off-by: Takashiro <takashiro@qq.com>
Installation pages

Signed-off-by: Takashiro <takashiro@qq.com>
Admin's model

Signed-off-by: Takashiro <takashiro@qq.com>