Green-top engineering company was founded in 1997
With the development/planning/design of thin shell building or structure for real estate building, business hotels,
Industrial plants, exhibition, musem, park buildings, landscape building
Group-top engineering has the overall project planning
And design and construction of turnkey ability to contain

Thin shell concrete building method main is in concrete or cement mortar in the joined at nano materials becomes naimitu (portland department crystal enhanced agent +nano filler+ high strength masonry feed)--scientific name--silicon crystal concrete makes its anti-pressure tensile strength greatly improve currently development out silicon crystal concrete (naimitu) tensile strength for 100-250kg/cm2 (10-25mpa) far than general concrete of tensile strength (30kg/cm2) (3mpa), compressive strength can get(300kg/cm2-700kg/cm2) (30-70mpa) due to will general concrete tensile strength of significantly improve comparison past traditional concrete, thin shell structural method has new life of began so can do for concrete thin shell resistance variant crack occurs of main materials

Thin shell concrte building can be design into dome or curved structure,
If span=50m height=22.5m its shell thickness=12cm, light weight can reduce the cost of all structure
Shell structures can carry relatively large point loads
Shell structures get their strength by shape and not by high strength of materials do not push stresses to their limit
Shell structures are very complex and carry forces by many paths
Shell structures, because of their complexity and unfamiliarity require a large lead time for developing the design
The supports for a shell are more important than the shell.