By Gabriel Tan
The comfortable triumph, which came courtesy of goals from Shi Jiayi, Khairul Amri, Shahril Ishak and Aleksandar Duric, meant the Lions head to the AFF Suzuki Cup in winning form - a welcome development for Radjoko Avramovic's men after they earlier suffered back-to-back defeats against Shimizu S-Pulse and the Philippines.
Despite dominating in their previous game against the Azkals last week, Singapore fell to a 1-0 loss despite having 19 efforts on goal and Hariss admits it was good for them to finally hit the back of the net.
"We scored four goals today [Monday]," he said. "It shows we took the chances that came our way.
"This result is a real boost for us, as individuals and as a team. It will give us confidence for the Suzuki Cup.
"We're setting up well and we just have to continue what we're doing."
The LIONSXII midfield general did admit his side will be facing significantly tougher opponents in Southeast Asia's most prestigious international competition, and believes they have to be wary of being hit on the counterattack, as they were against Philippines.
"There's still room for improvement, especially our transition from attack to defence," Hariss added.
"In our last match we were in control for 90 minutes but Philippines countered us well. We can expect fast teams in the AFF Suzuki Cup.
"We will need to play to our strengths and eliminate our weaknesses."
Despite the comprehensive nature of the defeat, Pakistan coach Zavisa Milosavljevic believed his side would take valuable lessons from the game, especially given that it was their first full international outing in almost a year.
"This match gaves us a lot of experience," he said. "We will do better and try our hardest next time out.
"If you compare them with Pakistan, Singapore have much better technique and are tactically organised. Individually, we were also unable to compare to them."
Singapore get their Suzuki Cup Group B campaign underway on Sunday when they take on arch-rivals Malaysia at the Bukit Jalil National Stadium.