Huanqiu carried an article that Beijing Evening News originally published on April 10. The article reported that, in the year since the Beijing Public Security Bureau issued a notice to reward citizens for offering information about suspicious spying activities, the bureau has received close to 5,000 calls. The article listed examples of a few reported spying activities. One involved a former classmate from a foreign country trying to obtain confidential academic information. A second one involved a person who was overseas attending an academic conference. The person was asked to provide confidential academic information in exchange for a permanent residence status. A third involved a Chinese cab driver who noticed a group of foreigners conducting suspicious activity near a restricted military area. The article claimed that the tipping hotline has received an increased number of calls and the end results have been effective. A VOA article reported that the monetary reward could be as high as 500,000 yuan (US$80,000) for each occurrence. When a VOA reporter called the tipping hotline, the operator who answered the call declined to comment on how many of the tips were eventually validated.
Sources:
1. Huanqiu, April 10, 2018
http://society.huanqiu.com/article/2018-04/11820948.html
2. VOA, April 13, 2018
https://www.voachinese.com/a/4345272.html