China had to relax over 7,000 tariffs, quotas and other trade barriers.

中国不得不放宽超过7000种的关税、限额和其它贸易壁垒。

This assumes, of course, that the advantage is not offset by a change in tariffs, quotas, etc.

当然，这是假设优势不会被关税、配额等的变化所抵消。