At the same time, before Li Tian decided to open the box, he had already sent people to inform the other family heads. Because the thing hidden in the box was dangerous and mysterious, Li Tian and the other six people were afraid that they wouldn't be able to deal with it alone. So, he first called the family heads to bright garden to make preparations.
The imperial family knew that Li Tian wanted to open the box, so they sent Messenger Meng. The Empress wanted to get what was in the box. Although her motive was not pure, she would still help.
Emissary Meng was the first to arrive at the bright garden with a group of people behind him. They were holding some things in their hands. After asking the servants, they found out that Li Tian was in the secret chamber and sent someone to pass on the message.