The Wall Street Journal U.S. and China Talk Fentanyl in Latest Sign of Thawing Ties — Meetings in Beijing follow restoration of military-to-military talks and a presidential summit. TikTok Pledged to Protect U.S. Data. $1.5 Billion Later, It’s Still Struggling. — Video-sharing app says it has walled off American data, but employees say data is still sometimes shared with its China-based parent. BYD Shares Fall as China’s Auto Price War Weighs on Bottom Line — BYD forecast a s