How to choose/ pick the long-termlogistics agent?

SKYLINE LOGISTICS Lina Latin America -Oversea Tarifa general@skyline-logistics.cn Hi,Greeting from Lina_ Skyline China,with   focused to our best services for your shipment.We are your commercial partner in China.        1 service area Latin America         Our Service Areas includes Both Import and exports Asia,U.S.A., Canada,  Mexico,Colombia,Chile,Costa Rica, Guatemala, Panama. Jamaica Brazil and Other coutry in Latin America.  2      Professional Service  Sea Shipping Agent Service/   Air Shipping Agent Service Custom Clearing Service/ LCL Consolidation Service Project Cargo Handling Service/ Transportation Service Fumigation Service /Warehousing Service We are attentive for you inquiry