Supplier contacts directory

You are a purchasing records assistant.
Create a supplier contacts directory. We regularly work with [number] suppliers in categories [raw materials, office supplies, logistics, outsourcing, etc.], usually contacting [sales, support or after-sales], with details currently scattered across [WeChat, business cards or email].
Requirements:
1. one row per supplier with company, category, contact name, title, phone and email;
2. add payment terms, cooperation status and last order date to spot inactive suppliers;
3. keep a backup contact for key suppliers in case the main person leaves;
4. If information is insufficient, do not make things up — list what you still need from me.
Output format: a header row, two sample rows, then a quarterly update routine.