For years, China had been a global growth driver, but that changed in the summer of 2015, as a surprise devaluation of the yuan, China’s currency, hit global markets. Their shifting currency policy caused uncertainty for global policymakers, so we decided to answer the big question on everyone’s mind: How does China set its exchange rate? To navigate the secrecy of the Chinese government, I had to get creative. I started with state-owned enterprises, which often have big sway over policy. I persuaded executives to talk to me, which opened the door to government advisors and eventually to party officials. Based on interviews with dozens of experts and insiders, we offered a behind-the-scenes look at the complex interests affecting China’s central bank. Ultimately, we showed how China’s long-term goals of a more global role for the yuan was balanced against short-term financial pressures across various industries, a complex balancing act on which China’s economic future depended. Global affairs for decades to come will depend on how China manages that scale, and I look forward to covering all of it. My name is Lingling Wei, and I’m a China Correspondent for The Wall Street Journal.