China has rattled Tehran by again backing the United Arab Emirates’s claim over three Persian Gulf islands controlled by Iran. Following a visit to Abu Dhabi by Chinese Foreign Minister Wang Yi, the countries in a joint statement on December 13 highlighted Beijing’s “support for the efforts of the UAE to reach a peaceful solution to the dispute” over the three islands of Greater Tunb, Lesser Tunb, and Abu Musa. Notably, there is no explicit mention of Iran in the statement. In response, Iranian Foreign Ministry…