Karma refers to the interpersonal relationship that people form from the needs of their profession or industry activities. According to the above definitions, Which of the following are karmic relationships:. ['Lao Zhang and Lao both like to play chess. They often get to know each other because they often go to the senior culture room to play chess and watch chess.', 'Xiao Xie is from Zhejiang and Xiao Xing is from Anhui. They knew each other because they lived in a dormitory in college.', 'Da Liu went on a business trip and met the old Feng Zhiqu on the train.', 'Xiao Huang is a salesman for the company. Because he often goes to Hongyuan to work, he knows Hongyuan manager Xiaohe over time.']