Dad's venture - Heilongjiang

To my surprise, dad has planned a trip to Heilongjiang.....and leaving this Fri with a friend - Mr Chang "for biz trip" ! I only found out from my Sis-in-law this a.m. what worries me is who is this man, why didnt he tell me personally -esp when we met for Lunch last Saturday.

Should I not interfere and ask too much? Should I let him be and not get worried? sigh.....Its hard to think positive being a pessismist myself.