Gu Yanran stood in her apartment staring at the messy room and inhaling deeply. She made herself calm down and carefully recalled the suggestions that person had told her over the phone.
She had been worried that she would forget while she was on the phone, so she suggested writing it down with a pen or noting it on her phone.
The person on the phone was extremely cautious. She warned Gu Yanran that memorizing it in her head would be the most secure method.
Regardless if she noted it with a pen or on her phone or computer, traces would be left behind.
As soon as there were traces of those things left behind, it would be possible for others to investigate.
Finally, that person repeatedly reminded her to not underestimate the enemy's abilities, especially that of Gu Nianzhi's boyfriend, Huo Shaoheng.