Shopify全球运费批量导入

I need a Shopify-compatible solution that lets me import and update shipping rates for every market I serve—United States, European Union, China and the rest of the world—without touching each zone by hand.

Core requirements
• One country must accept multiple weight breaks, for example 0–0.01 kg, 0.0101–0.02 kg, 0.0201–0.03 kg and so on, each with its own price.
• The import must scale to hundreds of countries and thousands of rows.
• A reusable template is essential; a plain-text CSV is preferred, but a lightweight script that generates the file from raw data is equally welcome.
• I expect practical, proven experience with Shopify’s Shipping & Delivery settings so the final import loads cleanly without hitting Shopify’s row limits or rate caps.
• Please include three hand-off items:
1. Clean, example-filled CSV template (or generator script)
2. Step-by-step operating document that covers upload, rollback and future edits
3. Brief summary of any Shopify API calls or rate-table constraints you used

Acceptance criteria
The file or script must import at least one complete global table in a live test store, showing correct prices for every listed weight tier in the US, EU and CN zones, plus a row for “Rest of World”, with no manual tweaks required after import.