To apply or inquire visa from the Phillipines

Hi, Me my daughter, 2 brothers and my cousin wanted to visit china for only one week do we realy have to apply for a visa? our plan is to inquire about electric motor kit as well a buy some, We also wanted to see the factory as well as travel to see the beautiful places in China. if so, how much is the visa fee, and we are willing to submit bank certification if needed,by the way each of us have to submit a bank certification right? because we wanted to put up business of electric bike here in Iloilo, but the motor kit and other parts will be purchase in China. Thanks and Godbless.