Brazil hopes that during a visit by Chinese President Xi Jinping it can boost ties with its biggest trade partner beyond the exchange of commodities for manufactured goods, but that may be wishful thinking. Accords China will sign with Brazil when Xi meets with President Dilma Rousseff on Thursday focus on improving infrastructure to make sure raw materials China is hungry for make it to port, with railways a top priority. Brazilian officials are portraying Xi's state visit as a milestone in deepening a strategic partnership that will lead to Chinese investments in Brazil's manufacturing industry. Trade between China and Brazil soared to $83.3 billion last year from $3.2 billion in 2002, with iron ore, soy and oil making up the bulk of Brazilian exports.