What does it look like when Chinese authorities deem it appropriate to have a presence on your internal company network, e.g., to possess your VPN keys? Do you

What does it look like when Chinese authorities deem it appropriate to have a presence on your internal company network, e.g., to possess your VPN keys? Do you get a polite letter telling you with whom to "negotiate" the issue? How soon does your intellectual property show up outside your control?