As leaders Donald Trump and Xi Jinping prepare for a long-heralded meeting Thursday, the sale of US technology to China is among the thorniest issues the US faces, with billions of dollars and the future of tech dominance at stake. But the tough talk about China obscures a deeper story: Even while warning about national security and human rights abuse, the US government across five Republican and Democratic administrations has repeatedly allowed and even actively helped American firms to sell technology to Chinese police, government agencies and surveillance companies, an Associated Press investigation has found. And time after time, despite...						
						 
								