The tiger, named Kuzya, is one of the three rare felines tagged with tracking devices that Putin helped release in the Far-Eastern Amur Region in May.
Kuzya was spotted in Taipinggou nature reserve in northeastern China, the reserve director, Chen Zhigang, told Xinhua.Chen said the reserve's employees would set up more than 60 cameras to locate the tiger and warn local farmer's of the feline's presence.
He added that Kuzya would find plenty of food in the 20,000-hectare nature reserve.
The Siberian tiger, also known as Amur tiger, is on the Red List of Threatened Species. In 2010, Russia launched a national strategy to protect the Siberian tiger, the largest of the five tiger species. According to World Wildlife Fund, some 450 Siberian tigers left on the planet.