What is your departure city? Anyway, there is no direct flight from Lebanon to Foshan or Guangzhou. If your departure city is Beirut, you could take a connecting flight to Guangzhou with transfer at Paris, which is available on each Monday, Wednesday, Friday and Saturday. After arriving at Guangzhou, you can take a coach or train to Foshan directly. Since there are many building material wholesales scattered in Guangzhou, you would better find a local tour guide to direct you. Or, you can visit the following page for tour and shopping in Guangzhou for reference: https://www.travelchinaguide.com/cityguides/guangzhou.htm