The Philippine military deliberately grounded the 100-metre (328-foot) World War II-vintage BRP Sierra Madre atop the Second Thomas Shoal in 1999 in an effort to check the advance of China, which four years earlier occupied Philippine-claimed Mischief Reef some 40 kilometres (25 miles) away.
Philippine Navy spokesman Colonel Edgard Arevalo said yesterday that the rust-ridden vessel was being repaired to ensure the ship remains livable for a tiny unit of marines guarding the reefs.
"China strongly protests and firmly opposes such an act," Hua said in a statement yesterday.
She also argued that Manila had gone back on its word by repeatedly promising to remove the ship -- a claim the Philippines denies.
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"The relevant activity fully exposed the Philippines' hypocrisy and that it is a double dealer," said Hua.
"It once again proved that the Philippines is truly a troublemaker and rule breaker in the region."
At the same time, the Philippines has asked a United Nations-backed tribunal to declare China's claim over most of the resource-rich South China Sea illegal.