The Anti-Corruption Informant Rewards and Protection Regulation Article 12

The safety of the Informant shall be protected; any threaten, intimidation or other illegal act done against the Informant shall be punished strictly.
中文原文 獎勵保護檢舉貪污瀆職辦法第12條
檢舉人之安全,應予保護,對檢舉人威脅、恐嚇或其他不法行為者,應依法嚴懲。

English translation for reference only; the Chinese text prevails. Not legal advice.