What do you mean by three clean-ups and two constructions?

According to Baidu Library, Sanqing and Liang Jian consulted:

Strengthening the construction of grass-roots party organizations is the key, focusing on improving the grass-roots mass autonomy system, taking the rural collective assets "looking back" as the starting point, and carrying out special actions in all administrative villages (communities) with the main contents of "clearing assets, clearing village tyrants, clearing contradictions, strengthening rural economic cooperation organizations and strengthening villagers' self-government organizations"