并列题名：In a sea of bitterness In a sea of bitterness 苦海 (Sea of bitterness) 并列题名：This side of brightness 并列题名：Dvantages of backwardness 并列题名：Area of darkness 并列题名：Essence of business 并列题名：Heart of brightness 并列题名：Heart of business 并列题名：Nature of business