Tipping is almost never seen in China (service workers might even refuse a tip), but government officials taking bribes is endemic.
Are you sure you're not thinking of
Japanese culture?
I've never once seen a Japanese worker accept a tip, regardless of position.
The reaction is generally subdued but can vary from mild confusion to personal insult.
On the other hand I've seen hundreds of Chinese people accept or even outright request a tip.
For most of my life calm and polite Japanese tourists were a common sight throughout much of Asia.
Now they're slowly being replaced with loud and obnoxious tourists from China who act like Americans.