Complex sentence: Chen returned to Guizhou Renhe after 2012 league season, but in July 2013, he was loaned to second tier side Hebei Zhongji until 31 December 2013.
Split into simpler sentences: Chen returned to Guizhou Renhe after 2012 league season. In July 2013, he was loaned to League Two side Hebei Zhongji until 31 December 2013.