Police are appealing for more than 50 more victims to come forward after one of the country's most prolific sex offenders was found guilty of drugging and raping 10 women. Chinese PhD student Zhenhao Zou, 28, filmed nine of the attacks as "souvenirs", and kept a trophy box of women's belongings, Inner London Crown Court was told. Warning: This article contains details of sexual offences Jurors found him guilty of 11 counts of rape against 10 women, three in London and seven in China, between 2019 and 2023. Two of the victims have been identified and another eight have yet…