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Stalking is a legal term for repeated harassment or other forms of invasion of a person's privacy in a manner that causes fear to its target.
However, the nature of the acts of stalking can be viewed as acts "interfering the tranquility of others' lives", and are prohibited under petty offence laws in China, made in 1987 (replaced by a new law, but the substance is preserved).
Stalking, as in the context of organised crimes suppression, is expressly forbidden under Macau's laws.