Wang Guiman's speech on black soil protection drew warm applause at the Northeast China Economic and Trade Promotion Event on Monday in Changchun, Jilin province.

The event's theme was "striving for new breakthroughs in the full revitalization of Northeast China". It attracted over 200 political party leaders, foreign diplomatic envoys and representatives of foreign business communities in China from more than 50 countries and regions.

Wang, director of Lishu county's agricultural technology extension station, drew comparisons between the land using the Lishu model and traditional farming over the past 15 years.