In 2006, Vanuatu signed an economic cooperation agreement with China, whereby the latter was to assist Vanuatu's economic development, and remove tariffs on imports from Vanuatu. China also added Vanuatu to its list of approved tourism destinations for Chinese tourists. Ni-Vanuatu trade minister James Bule said his country had also requested China's assistance "in supplying machines so we can establish a plant in Vanuatu to produce bio fuel". By contrast, Opposition leader Serge Vohor has said China is exerting too much influence on the ni-Vanuatu government's policy.