WeChat was an app developed by the company headquartered in what city?
Nanshan District
Title: Miitomo
Passage: Miitomo (ミートモ , Mītomo ) is a freemium social networking mobile app developed by Nintendo for iOS and Android devices.  The app, Nintendo's first, allows users to converse with friends by answering various questions, and features Twitter and Facebook integration.  The app was released in March 2016, launching alongside their My Nintendo service.  The app can only be used when connected to Nintendo's servers.  Over 10 million users have downloaded "Miitomo" since release.
Title: WeChat
Passage: WeChat () is a Chinese social media (instant messaging, commerce and payment services) mobile application software developed by Tencent.  It was first released in 2011 and by 2017 it was one of the largest standalone messaging apps by monthly active users, with over 963 million monthly active users.  It is widely known as one of the world's most innovative and versatile app, as well as China's "App For Everything", with numerous unique functions and platforms ranging from 'payment' to 'social media' to 'services' to 'shopping' and more, that are equivalent to multiple Google Play or App Store's apps, but merged into one.
Title: Tencent
Passage: Tencent Holdings Limited (; ) is a Chinese investment holding company whose subsidiaries provide media, entertainment, payment systems, smartphones, internet mobile phone value-added services and operate online advertising services in China.  Its headquarters are in Nanshan District, Shenzhen.
WeChat Tencent