A major investment firm from Southern California has allied with a China-based residential developer to build a big condominium project in Sunnyvale.

Long Beach-based Arroyo Capital has bought a large parcel in Sunnyvale and teamed up to develop the project of townhomes with Landsea Homes, a housing builder that is a unit of China-based Landsea Group.

“Landsea is a wonderful operator and developer,” said Dan McCann, a principal executive with Arroyo Capital, which provides development capital and financial support for experienced residential builders such as Landsea Homes. “Landsea is going to be the actual developer.”