1. Conflict of interest: If there are differences between acquaintances on issues such as profit sharing and investment ratio, it may lead to tension or even breakup of the partnership.

2. Trust issues: although there is a foundation of trust between acquaintances, trust may be challenged in a business environment. For example, problems may arise in financial management, personnel management, etc., leading to a deterioration of the relationship.

3. Communication barriers: Due to familiarity with each other, there may be a lack of directness and candor in communication, which can easily lead to misunderstandings and conflicts.

4. Ambiguous definition of responsibilities: In cooperation, how to clarify their respective responsibilities and rights may become ambiguous, leading to disputes.

5. Impact on personal relationships: Working with acquaintances may cause both parties to face complicated interpersonal relationships in addition to their work, affecting their quality of life.

6. Legal risk: If there is a problem with the partnership, it may involve legal disputes and bring unnecessary trouble to both parties.

So, when you consider doing catering with acquaintances, you need to fully consider the above factors to ensure that the partnership can be long and stable.