What were the rules for trading with China?

Significant trade policy changes occurred in 1991 as the Chinese economy became more efficient and competitive. Tariff rates, import obligatory plans, import quotas, and licences were all reduced as part of a much more aggressive trade liberalization effort.

the section of the chart that represents a point at which a bill needs approval from a majority of people in both chambers to advance is j, as this is the only section before the bill becomes law which has both rows (symbolizing the chambers) converging into one, meaning that the two parts of the congress have to approve of it before it can march on with the process.