2 sentences

1. 改革开放促进了我国经济体制的转型。

   gǎi​gé kāi​fàng cù​jìn le wǒ guó jīng​jì​tǐ​zhì de zhuǎn​xíng.

   Reform and opening-up promoted the transformation of China's economic system.

   Source: Dong Chinese Dictionary

2. 改革开放极大地改变了中国的经济体制。

   gǎi​gé kāi​fàng jí dà de gǎi​biàn le Zhōng​guó de jīng​jì tǐ​zhì.

   The reform and opening-up policy has drastically changed China's economic system.

   Source: Dong Chinese Dictionary