Since you asked for positive aspects, and I have none to report, I almost refrained from answering.  Most of them are rude, ignore you, while taking care of you will stop and take care of a chinese national who wlked up front bypassing line of others waiting, and all they know to say to you is "mei you", or come back tomorrow.
I am sure that there must be some hard working, honest ones somewhere, but I have not found them yet.

The local officials and police in Zhenjiang, Jiangsu, are the most corrupt bunch of thieves I ever met, and don't even bother hiding their links with the street gangs that run the city, hell they even brag about the street gangs: the same street gangs that cut off people's limbs, throw scalding water on children to build an army of beggars, and kidnap ten year old girls in order to fuel the city's main industry: the child sex trade. In a quite poor city, they flash their weath like you wouldn't believe.

I hope someone in Beijing catches on and puts a bullet through every single one of their heads.

The officers I have dealt with from front desk officers to mayors have run the gamut from friendly to hostile.  

mattayayayayaya are you feeling shame for some reason? all these anon posts. my experience with local officials has been minimal. in hohhot nothing but good things. south (GZ and nanchang) lazy pucks . i'm not going to venture to say any more

The only government officials I've met are lower level ones, and only at a meal because I happened to be along with someone that knew them. I don't speak Chinese, so I have no idea what they said. Everybody is pretty normal when they eat. Otherwise, I've never had to actually deal with any.

Some seemed to be ok, others lazy farqs. Ditto about helping out locals while 'dealing' with me. On other occasions, it was just the 'get another person out of the line" thing, so nothing much different. Customer service doesn't really exist here, unless you throw a foreigner tantrum! Sure, might leave a negative impression, but it can get things done!