Can an organization buy birthday cakes for its employees without inviting tenders?

Different places have different rules. For example, bidding for public institutions in Shenzhen means that those who have used financial allocations and the amount is more than 200,000 yuan, or those things in the Catalogue of Centralized Procurement of Shenzhen Municipal Government need bidding, and others do not. Buying a birthday cake obviously doesn't fall into this category.