The law controlling domestic violence in Hong Kong was amended in 2008 and 2009. The revised law introduces a new injunction order which can mandate that abusers attend counseling programmes, and extends legal protection to same-sex couples. As the author have argued elsewhere, the changes in the law can create (gender/sexual) justice as both issues engage with traditional Han-Chinese culture. Nonetheless, with the implementation of the new machine, the following two questions still need to be addressed. Can the changes produce justice? What is justice? This paper investigates, in Deleuzean terms, how the machine of anti-domestic violence law in Hong Kong creates the becoming of justice. Hopefully, the examination of this issue can also shed light on the future development in mainland China of the law controlling domestic violence.