VISA information about attending HBM conference in Beijing for a person on H1B visa in US

HI,
I am an indian citizen, current residing in United States on H1B visa.
I am planning to travel to Beijing,China between June 10-June 14.
I am planning to travel between June 5- June 15.
How should i apply for VISA? Should i go to a consulate in United States in order to apply for the visa?
Which type of VISA should i apply for and how early is it necessary to apply for visa.
Thanks