The China Securities Journal proposed a more skilful use of interest rate is necessary to rein in growth, Forbes reports Tuesday. Since macro-control exercise limited effects, interest rate hikes is the only practical option.   China posted a record $14.5 billion trade surplus in June as exports surged, a 49% year-on-year jump.   Forbes cited the source, “As it is impractical to expect significant appreciation in yuan in the short term, interest rate hikes are the only option left for the central bank - whether it is to raise deposit rates or loosen restrictions on lending rates.”   The National Development and Reform Commission (NDRC), China's leading economic planning agency, has also proposed in a report published yesterday that the authorities should raise benchmark deposit and lending rates concurrently by 25 basis points as part of efforts to curb surplus investment.