Prime Minister Manmohan Singh today urged state governments to draw from the Chinese model of rural development with focus on value addition and business hubs.Underlining the need for a uniform vision for rural development that can respond differently and purposefully to situations in different states, the Prime Minister said that the strategy for rural development must be fashioned to unleash the productive potential of agriculture and allied activities. "We need to learn from the Chinese model of rural business hubs that add value to the agricultural produce within the rural areas. There is a new big opportunity in terms of the herbal wealth in tribal areas, which can greatly benefit from the attention now given by the business to non-timber wood products", Dr Singh said at the Chief Ministers' on Panchayati Raj and Rural Development here.