郑州、榆林、洛阳、太原，这四个百强市一季度经济增量为负

Group 1 - The nominal GDP growth rates for cities such as Zhengzhou, Yulin, Luoyang, and Taiyuan have turned negative compared to the same period last year, with Taiyuan experiencing the largest drop in ranking, falling 8 places to 64th [3] - Zhengzhou, Yulin, and Luoyang also reported negative nominal growth rates of -2.22%, -0.42%, and -1.36% respectively, with Zhengzhou ranking last among the top 100 cities [3] - Despite negative nominal growth, the actual GDP growth rates for these cities were positive, with Zhengzhou and Yulin at 5.6%, Luoyang at 5.9%, and Taiyuan at 3.5% [4][6] Group 2 - Zhengzhou's industrial output and consumer spending showed positive signs, with industrial value-added growth of 8.8% and retail sales growth of 5.7% in the first quarter [8] - Luoyang faces significant challenges in industrial transformation, having experienced negative GDP growth for two consecutive years, with a need to restructure its industrial base to avoid being left behind [12][15] - Taiyuan's economy is heavily reliant on coal prices, which have been declining, leading to a decrease in railway freight volume and industrial output, indicating a need for diversification [13][14] Group 3 - Yulin is making strides in industrial transformation, with over 80% of its industrial output coming from energy industries, and is developing new sectors such as hydrogen energy and low-altitude economy [14][15] - The cities facing negative growth have shown some positive developments, such as Zhengzhou's automotive manufacturing growth of 26.9% and Taiyuan's private investment growth of 45.5% [15] - The overall economic recovery for these cities hinges on industrial transformation, increased fixed asset investment, and consumer promotion [15]