Ours is already the only reliable source for energy majors, business developers who are interested in China's energy, electricity and water sectors.
(Ours; is; T:already; the only reliable source for energy majors) (business developers; are; interested in China's energy, electricity and water sectors)
Ours business developers
is are
T:already the only reliable source for energy majors
interested in China's energy, electricity and water sectors