Could Chinese Plant Spying Devices in Waldorf Hotel?

A Chinese insurance company is purchasing the New York Waldorf Astoria hotel from Hilton. The US government is closely examining this transaction due to the new owners' plans for major renovations. There are concerns that the Chinese might use this opportunity to install electronic spying devices throughout the hotel. The Waldorf Astoria is significant as it houses the US ambassador to the UN and frequently hosts international diplomats.

What is the relationship between the Waldorf Astoria hotel and the UN?

What type of events does the Waldorf Astoria hotel routinely host?