Question: where is the headquarters of the  Chinese investment holding company  who developed WeChat 

Context paragraphs:
Chinese Estates Holdings: Chinese Estates Holdings Limited () is a major Chinese investment holding company, based in Hong Kong.

Shenzhen International Holdings: Shenzhen International Holdings Limited () is engaged in the investment, construction and operation of logistics infrastructure facilities, third party logistics services and logistics information services.  It is held by Shenzhen Investment Holding Corporation, an investment holding institution owned by Shenzhen Government and Cheung Kong Holdings.

Man Wah Holdings Limited: Man Wah Holdings Limited(stock code:1999. HK,) is a Chinese investment holding company principally engaged in the production and sale of sofa products,which was founded in 1992 and is based in Fotan, Hong Kong. Man Wah was listed on the Singapore Stock Exchange on June 16, 2005and delisted on September 2009,whose Initial Public Offerings in Hong Kong Stock Exchange was on April 9,2010.

Legend Holdings: Legend Holdings Corporation () is a Chinese investment holding company with interests in finance, real estate, and information technology, and the controlling shareholder of its better-known subsidiary, the Lenovo Group.  Formed by the Chinese Academy of Sciences, Lenovo was originally Legend Computer, until the English name was changed in 2004.  Its Chinese name however remains the same, 联想 (  ).

Bio Products Laboratory: The Bio Products Laboratory (BPL) is a company involved in the manufacture of human blood plasma products, located in Elstree in the United Kingdom.  It is owned by the Creat Group, a Chinese investment firm.  Before August 2016, it had been owned by Bain Capital (80%) and the UK Government (20%) via holding company Plasma Resources UK Ltd.  BPL is run as a commercial business and supplies plasma derived products to the National Health Service in the UK as well as to markets in 45 countries.

Alleghany Corporation: Alleghany Corporation is an investment holding company originally created by the railroad entrepreneurs Oris and Mantis Van Sweringen as a holding company for their railroad interests.  It was incorporated in 1929 and reincorporated in Delaware in 1984.

Tencent: 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.

Imperial Pacific: Imperial Pacific International Holdings Limited ( is a Chinese investment holding company.  It was founded with headquarters in Hong Kong and originally named First Natural Foods Holdings until it was renamed in May 2014.  It operates as a subsidiary of Inventive Star Limited.

WeChat: 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.

First Pacific Bank: First Pacific Bank Limited (traditional Chinese: 第一太平銀行) is a bank based in Hong Kong.  It was a wholly owned subsidiary of the investment holding company FPB Bank Holding Company Limited (FPB Bank Holdco).  Its headquarters were in the First Pacific Bank Centre in Wan Chai.

Supporting paragraphs: WeChat Tencent
Answer: Nanshan District, Shenzhen.