How much tilt should photovoltaic panels have to be to be effective

To optimize performance, tilt your panels at an angle that is 10-15 degrees less than your latitude. For example, if you live at a latitude of 40 degrees, set your panels at about 25-30 degrees. [pdf]

Where is the Xiong an solar power station

In April 2017, China announced a plan to establish the Xiong'an New Area, which spans the Rongcheng, Anxin and Xiongxian counties, as well as some adjacent areas in north China's Hebei Province. [pdf]
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