For  example, the use of physical letters and postcards has been dwarfed by emails and digital photos, with the estimated number of letter-like items sent worldwide in one year roughly equal to the number of emails sent in a single day. 3 Instant messaging apps such as QQ and WhatsApp allow their estimated three billion users to have digital conversations across the globe.
4  BIS Review 33/2005  We will make active and steady efforts to push ahead with the reform of the RMB exchange rate regime on a well-planned and step-by-step basis. Relevant policy measures will only be taken at proper time.