State television showed footage of Tajikistan's President Emomali Rakhmon clutching two gold ingots produced at the Pokrud gold mine and announced investments totalling $256 million at the mine to date.
The mine operated by the Pokrud Chinese-Tajik joint venture is expected to produce around 1.3 tonnes of gold per year initially, with production rising to 2 tonnes per year later, the TV report said.
The mineral concession just south of the capital Dushanbe is one of several operated by Chinese companies.
Tajikistan, a landlocked country of over 8 million that borders both China and Afghanistan suffers from an absence of foreign investment and looks to Beijing to help prop up the domestic economy.
Remittances from over a million nationals working in Russia have fallen sharply on the back of a contagious financial crisis prompted by Western sanctions against Moscow and falling oil prices.