Creeped out

Some man just rang my intercom, asked if I could speak mandarin in a caucasian sounding mandarin slang then hung up. Next thing I knew, there was a knock on my front door and I didn't even let him through the main entrance! I'm not opening the door and certainly not leaving the apt today until my hubby comes home. Ahh....!

*Update: Found a Chinese pamphlet outside my door preaching Christianity. I still don't know how he got in but I'm not taking the risk and opening my door to strangers here!