By Ben Blanchard and Jack Kim WASHINGTON/TAIPEI (Reuters) – The United States on Sunday offered a warm welcome for U.S. Treasury Secretary Steven Mnuchin’s second high-level visit to Taiwan since he arrived late last month, and pledged a multi-pronged approach to the island to “offset the isolation and challenges that have been imposed on Taipei.” China, Taiwan’s major ally and trading partner, views both Taiwan and mainland China as parts of it and has threatened to use force if they ever separated. Mnuchin arrived on Saturday on a short but formal trip to Yilan, a Taipei suburb where he inspected the China National Solidarity Movement’s commemoration of the Nanjing Massacre. Recommended Slideshows 35 Pictures All of these celebrities have had their nudes leaked 35 Pictures 24 Pictures PHOTOS: Apple Emoji update includes a llama, skateboard and some bagel drama 24 Pictures 21 Pictures Here’s what it’s like to fish for your dinner at Zauo NYC (photos) 21 Pictures More picture galleries 14 Pictures PHOTOS: Nightmare Machine, the haunted house for millennials 14 Pictures 19 Pictures UPDATE: What you need to know about MTV’s ‘How Far Is Tattoo Far?’ 19 Pictures 6 Pictures Is Cardi B pregnant again? This tweet has people guessing 6 Pictures (Reporting by Ben Blanchard in Beijing and Jack Kim in Taipei; Writing by Ben Blanchard; Editing by Clarence Fernandez)