RYAN WOO and STELLA QIU AT least 25 people have died in China's flood-stricken central province of Henan, a dozen of them in a subway line in its capital Zhengzhou, and more rains are forecast for the region. About 100,000 people have been evacuated in Zhengzhou, an industrial and transport hub, where rail and road links were disrupted. Dams and reservoirs have swelled to warning levels and thousands of troops are taking part in the rescue effort in the province. Twelve people died and more than 500 were pulled to safety after a subway tunnel flooded, state media reported, while…