https://www.channelnewsasia.com/singapore/lawrence-wong-pap-mps-rules-parliament-5158091
Many are altruistic, public-spirited individuals who will help "without wanting anything in return".
"But a few will seek to cultivate you to obtain benefits for themselves or their companies, to gain respectability by association with you, or to get you to influence ministries and statutory boards to make decisions in their favour," said Mr Wong.
"Gift hampers on festive occasions, dinners and entertainment, concert tickets and personal favours big and small are just some of the countless social lubricants which such people use to ingratiate themselves to MPs and make you obligated to them."
"Both in conduct and perception, you must stand above any hint of favour or influence," the prime minister added.
MPs may also often be approached by friends, grassroots leaders or businesspeople to officiate at the openings of new premises or other business events.
As a general rule, they should decline invitations to such events, said Mr Wong. But if they feel the need to attend, they should seek prior approval from the PAP's party whip, Dr Janil Puthucheary, who continues in the role.
Earlier this month,
private dinners involving convicted money launderer Su Haijin and ministers Chee Hong Tat and Ong Ye Kung made headlines after pictures of the gatherings circulated online.