Many thanks to Fang Zheng, International Student Adviser at the University of Sheffield, for translating.
(In English, the item says:
Chinese students: beware of WeChat scam
We’ve been made aware that a number of students across UK universities have been targeted by fraudsters and have lost large sums of money.
This scam is targeting Chinese students and involves WeChat and mobile contacts. Students are contacted on their mobile phone by people claiming to represent their bank, the embassy, police or other reputable agency and are told they owe funds immediately, often being offered preferential exchange rates on currency conversions.
Please do not give any payments or personal information from unsolicited calls. If you think you may have been targeted by this scam please contact your university’s international office or report it to Action Fraud.)