An automatic guiding system will be launched for visitors of the Thang Long Imperial Citadel site. Thang Long Imperial Citadel site is a popular site in Hanoi According to the Thang Long – Hanoi Heritage Conservation Centre, illustrations and videos will be provided to guide visitors around the historical site through their smartphones from late January. Visitors can download the application on App Store or CH Play for free when searching for Hoang Thanh Thang Long (Thang Long Imperial Citadel), the centre said. The app is available in languages including Vietnamese, English and Japanese. The centre will work with app developers to create French and Chinese versions later this year as well as improve other functions, it added. The Thang Long Imperial Citadel was recognised as a UNESCO World Heritage Site in 2010. The citadel keeps many artefacts and items dating back to between the 6th and 20th centuries including foundations of old palaces, ancient roads, ponds and wells which were excavated in 2004. Archaeologists also found bronze coins, ceramics and pottery from many places in Asia, all of which demonstrate a close trading relationship in the area.