March The National Task Force for the West Philippine Sea (NTF-WPS), a task force of the Philippine government, received a report that around 220 Chinese fishing ships were monitored to have moored at
Whitsun Reef as early as March 7, 2021. The NTF-WPS reported that the Chinese marine vessels were not engaging in fishing activities and noted the clear weather in the vicinity at around that time. The NTF-WPS also took note of the incident due to "possible
overfishing and destruction of the marine environment, as well as risks to the safety of navigation". The Chinese vessels were observed to have been lying side by side in formation. The
Armed Forces of the Philippines said in response to the NTF-WPS report that its
Western Command had sent assets of the
Philippine Air Force and
Navy to the South China Sea to further validate the report. On March 21, Philippine
Department of National Defense (DFA) Secretary
Delfin Lorenzana issued a demand to China to have the marine vessels, which he alleged were part of a maritime
militia, withdraw from Whitsun Reef; calling the mooring as an act of incursion. The following day, China's
Ministry of Foreign Affairs (MFA) disputed the Philippine claim regarding the situation, saying that the fishing boats took shelter at the Whitsun Reef due to rough sea and wind conditions and insisted that their mooring was normal, also saying, "there is no Chinese Maritime Militia as alleged".
Vietnam, also a claimant country of the Whitsun Reef, issued a statement on March 25 objecting to Chinese presence in the reef. A ship of the
Vietnam Coast Guard also reportedly moored near the reef.
April The Philippine military documented structures which it considers illegal in the
Union Banks on April 1, 2021, although it did not directly attribute the structures to China. Philippine Foreign Affairs Secretary
Teodoro Locsin Jr. and Chinese Foreign Minister
Wang Yi held talks regarding the Whitsun Reef incident on April 2 in
Fujian. The following day Philippine Defense Secretary
Delfin Lorenzana repeated calls for China to withdraw ships in the area saying he is "no fool", that there is no good reason for the ships to remain in the area, and remarking that the "weather has been good so far". He cited aerial surveillance results that there were still 44 Chinese vessels moored in the reef at that time. He further remarked that China is planning to occupy more features in the South China Sea. The Chinese Embassy in Manila rebuked Lorenzana's remarks, branding them "perplexing" and "unprofessional". The Philippines' foreign department supported Lorenzana's remarks on April 5, and pledged to file further diplomatic protests if the Philippines' demand for Chinese ships to withdraw from Whitsun Reef is not met or compliance is delayed. The Chinese Foreign Ministry released a statement on April 6 calling for the Philippines to stop "hyping up" the issue and urged the country to preserve peace and stability in the region, while reiterating China's sovereignty over the
South China Sea islands. It also maintained that China doesn't intend to maintain a "permanent presence" in the area. In response, Foreign Secretary Locsin repeated the Philippines demand for China to order the ships to withdraw if that was the case, remarked that "Nobody fishes by lashing ships together", and referenced the act to the
Persian invasion of Greece. The Philippines filed another diplomatic protest. As of April 8, bilateral talks over the incident are still taking place despite the repeated hostile public verbal exchanges. and expelling a Chinese diplomat. On the same day, ABS-CBN reporters on board a ship near the
Second Thomas Shoal were confronted by the Chinese Navy. The following day, Foreign Secretary Locsin and US Secretary of State
Antony Blinken had talks over the phone over various issues including the Chinese presence at Whitsun Reef. Foreign Secretary Locsin summoned
Huang Xilian, the Chinese ambassador to the Philippines on April 13. In the meeting, Locsin made his stance of objecting to China's "illegal lingering presence" in the reef known. As of that date the NTF-WPS reports that while 9 Chinese ships remained at Whitsun Reef itself, around 231 other Chinese vessels were spotted in other maritime features of the Spratly Islands. The Philippines filed another diplomatic protest the following day. President
Rodrigo Duterte remarked on April 19, that he does not care about the issue of fishing rights in the South China Sea but added that he is prepared to send naval ships in the area if China begins drilling for oil and other mineral resources. On April 21, two more protests were filed over what the Philippines says as China's "blatant disregard" of its prior commitment to "promote peace and stability in the region" due to the presence of around 160 Chinese ships within the Philippines' claimed exclusive economic zone in the South China Sea.
Later months By mid-May 2021, there were only 9 vessels in the
Union Banks. However the number of ships in the Union Banks increased again to 236 in mid-June 2021. By May 28, 2021, the Philippines' foreign department has filed its 100th diplomatic protest over Chinese presence within the country's claim exclusive economic zone in the South China Sea. ==Reactions==