New York (CNN Business)Tesla sales dropped sharply in China, according to a trade group report, suggesting it is losing ground in the world’s largest market for both traditional and electric vehicles. The China Passenger Car Association reported that Tesla’s sales in China fell to 8,621 cars in July, down nearly 70% from June. But the export of cars built at Tesla’s Shanghai plant jumped to 24,347 for July, compared with 5,017 in June. That means total sales of Chinese-built Teslas fell less than 1% overall. Critics say the steep decline of sales to Chinese consumers is yet another sign of...