Does the subject want to ask "what subtitle did the market supervision implement before May 1?" Market supervision carried out publicity before May Day, mainly focusing on food safety publicity, consumer rights protection publicity and tourism market publicity.

1. Food safety publicity: In view of the increase of people flow and food sales during the May Day period, we will intensify food safety publicity to remind consumers of food safety and avoid food poisoning.

2. Publicity on consumer rights protection: Strengthen the publicity on consumers' awareness of rights protection, and remind consumers to pay attention to keeping invoices, warranty cards and other relevant documents when shopping, so as to safeguard their own rights and interests.

3. Tourism market publicity: publicize the safety measures and service quality of scenic spots and tourist areas to remind tourists to pay attention to tourism safety and avoid accidents.