"Double protection" means two-way protection from each other.
"Today's assassins are doing evil everywhere. You have to eradicate them and protect our country. I will let another person complete this task with you."
Su Hengyu: Are you the child of my master's friend?
Yun Jingzhou: Are you the apprentice of my father's friend?
Cough cough cough…
"I want to protect you."/"Who dares to touch him?"
Hold each other and listen to each other's inner voice and resonate.
Intention: Don't be afraid of anything, advance and retreat together