The Philippines' defence secretary went on an angry rant against China after a memo was handed to him mid-talks at an international forum, sparking a rebuke from Beijing.Gilberto Teodoro Jr chided China at the Seoul Defence Dialogue on Tuesday after a staffer walked up to him and placed a slip of paper on the table next to him as he was addressing tensions in the South China Sea.In an incident caught on camera, Mr Teodoro Jr is seen trying to read the note left on the table, saying "I think this is from China," before responding to it line-by-line."China's position on the South China Sea arbitration is clear, consistent and firm. They have no position. The arbitration violates fundamental principles of international law," Teodoro Jr said, reading the note.Teodoro Jr again addressed the audience at the forum and asked China to "have some shame"."How can you deal with a country in an international forum – beyond the question asked to me – disrespecting the organisers of this forum, how do you expect to deal with it civilly?" he asked.Moment when Gilberto Teodoro Jr reads note slipped to him by a staffer (X/dndphl)"I ask you the question, is this the right paper to post to me when I'm being asked a question on the floor? And how will you treat this kind of behaviour?"It not only disrespects international law, throwing UNCLOS (United Nations Convention on the Law of the Sea) to the floor and trampling upon it, but it also disrespects the basic decency that should be accorded to our most gracious host, the Republic of Korea, and the rest of the audience here. So, perhaps basic decency and behaviour is what China needs to do."The Philippine official referred to the passing of the note as an example of "actual coercion, bullying and aggression"."I will keep this paper as a memento of how desperate China is and how ineffective its position is in the face of a free audience," he said."Thank you very much for the person who gave me this piece of paper. You've just done your country a great service. Thank you, and I hope you don't suffer in a gulag for it," Mr Teodoro Jr said.China's foreign ministry on Wednesday called on the Philippines to "stop damaging China-Philippines relations and regional stability in the South China Sea."In this photo taken from video from the Armed Forces of the Philippines, China Coast Guard personnel, left, on rigid hull inflatable boat confronts Philippine Navy personnel (AP)Chinese foreign ministry spokesperson, Mao Ning, urged "certain individuals in the Philippines to stop clout-chasing, stop making trouble and stirring up strife".Mr Teodoro Jr, who is an outspoken critic of China, was addressing maritime challenges facing his country and the importance of compliance with the UNCLOS during a panel discussion at the Seoul Defence Dialogue – an annual security forum hosted by South Korea's defense ministry.The note came from a Chinese military attaché with the Chinese embassy in Seoul, Yonhap reported, citing forum organisers.It said the attaché passed the slip to a staff member and asked that it be passed to the secretary. The staff member mistook it for a message from Mr Teodoro Jr's own delegation and delivered it directly to him while he was speaking, the report said.Earlier this year, China imposed sanctions against Mr Teodoro Jr after accusing him of making remarks that strained ties between the two countries and threatened to raise tensions in the already sour relations.File Philippines Defence Minister Gilberto Teodoro speaks during an interview at the IISS Shangri-La Dialogue security summit in Singapore (Reuters)The video of the incident was widely circulated on social media and comes at a time when Manila and Beijing are in the midst of a dispute over their coast guards repeatedly clashing in disputed areas.In July, the Chinese Coast Guard and Philippine Navy were filmed clashing with oars and sticks at the Second Thomas Shoal, a submerged reef in the Spratly Islands, 194km west of the Philippines.The shoal is heavily disputed, as it is claimed by China, the Philippines, Taiwan and Vietnam. At the same time, the Philippine Navy maintains a garrison aboard the BRP Sierra Madre, a World War II-era ship that was intentionally grounded on the reef in 1999.