Correct

参建

/ shēn jiàn / 
Strokes

Example

As a Verb

participate in building a project

1
Gāi
该
xiàngmù
项目
yóu
由
liù
六
gè
个
dānwèi
单位
shēnjiàn
参建
  
。

Six units participated in constructing this project.