Asian markets stumbled on Wednesday as relief China had matched its own growth target was soured by poor readings on consumer demand and industrial activity, underlining the need for more policy action by Beijing. European stock markets were, however, expected to open flat to higher. The European Central Bank is expected to keep rates unchanged when it meets later on Wednesday. Data earlier in the day showed growth in China’s colossal economy did slow to a six-year low of 7 percent in the first quarter, but that was better than many feared after a woeful trade performance in March.