Official language after unifying the country in 221 BC. Classical Chinese would remain the standard written language for the next 2000 years. Standardization of the spoken language received less political attention, and Mandarin developed on an "ad hoc" basis from the dialects of the various imperial capitals until being officially standardized in the early twentieth century. According to an undated chart by the American pro-English-only organization known as U.S. English, 178 countries have an official language at the national level. Among those, English is the most common with 67 nations giving it official status. French is second with 29 countries, Arabic is
Visa policy of Zambia days in one year for business: In addition, visa exemption applies to holders of passports issued to residents of the following jurisdictions: Nationals of following 94 countries and territories may obtain a visa for Zambia on arrival for up to 90 days as tourists or 30 days for business: Holders of diplomatic or official passports of any countries may obtain visa on arrival. Zambia introduced an e-Visa system in late 2014. It is an alternative to visas issued at Zambian missions abroad or on arrival. Visa holder can stay in Zambia for the period of 90 days during a given