Huawei cannot use the publicly released open source code that comprises the Android Open Source Project (AOSP). International trade lawyer and former assistant secretary of commerce for export administration during the Obama administration, Kevin Wolf, explained that Huawei would not be allowed to use AOSP, since a considerable part of AOSP is made by Google, which is a US company, and thus, AOSP is subject to US trade regulations.  In China, it is normal for Android phones (including those of Huawei) to not include Google Play Store or GMS, as Google does not do business in the region. Phones are typically bundled with an AOSP-based distribution built around an OEM's own software suite, including either a first-party app store run by the OEM (such as Huawei's own AppGallery) or a third-party service.  It was noted that Huawei had been working on its own in-house operating system codenamed "HongMeng OS": in an interview with Die Welt, executive Richard Yu stated that such an OS could be used as a "plan B" if it were prevented from using Android or Windows as the result of U. S. action, but that he would "prefer to work with the ecosystems of Google and Microsoft". Efforts to develop an in-house OS at Huawei date back as far as 2012.  Huawei has also filed trademarks relating to the names "Ark" and "Ark OS" in Europe.