Lam is expected to oversee the signing of agreements including a potential aircraft deal between budget carrier VietJet Aviation JSC and Commercial Aircraft Corp. of China Ltd., known as Comac, though it’s unclear whether this would involve purchases or leases, according to people familiar with the matter who asked not to be identified discussing confidential matters. The two countries are also expected to sign pacts on metro construction in Ho Chi Minh City, as well as energy and telecommunications, the people said.