SHANGHAI, April 21 (Reuters) - Honda Motor Co. , Japan's second-biggest auto maker, said on Thursday it was on track to reach its sales target in China for this year despite a slowdown in growth in the world's third-biggest car market. "Our first-quarter sales were basically in line with our plans," Atsuyoshi Hyogo, chief of Honda's Chinese operations, told Reuters in an interview. The maker of the Accord sedan said it sold 49,800 cars in January-March through its two local joint ventures,