Immersing oneself in the ocean and getting up close and personal with marine life are popular activities in the tropics as people yearn to connect with nature. So it's only natural that Hainan province is emerging as a go-to destination for intimate marine adventures — whether it's beachcombing along the shore or snorkeling in the depths.

During a visit to Hainan, a balmy island in the South China Sea, visitors can make warm memories — visiting pristine beaches and exclusive beachcombing spots. It's a delightful battle of wits to find some of the many treasures hidden in the sand.

The picturesque mud flats of Beigang Island in Haikou are a bustling hub of activity for beachcombing enthusiasts, both locals and tourists alike. As the sun rises and falls, thousands of oysters, razor clams and mantis shrimps can be harvested by those with the requisite skills, providing a unique and lucrative source of income for the community.

One of the local beachcombers, Weng Qiongyu, has been honing her craft since the tender age of 6. Now 62, she not only gathers shellfish for sale but also serves as a "beachcombing aunt", guiding small groups of tourists on thrilling natural treasure hunts.

Under the guidance of experienced beachcombing practitioners, visitors from near and far are treated to an unforgettable experience, losing themselves in the rich biodiversity of Beigang Island's mud flats.

Weng said understanding the tidal patterns is crucial when beachcombing in Hainan. The tide shifts in a rhythmic, repetitive cycle, and visitors must plan their trips with the tidal clock in mind to ensure they go out to dig in the sand at optimal times.

The first to 15th day of the Chinese lunar calendar is the spring tide period. High tides are followed by low tides, when water recedes significantly to reveal a larger seabed for beachcombing. The so-called low-tide season occurs from the sixth to 12th day of the lunar calendar.

Essential tools for beachcombing include a shovel, tongs, a headlamp or flashlight, gloves, nonslip shoes and a bucket.

Yang Chen, a visitor from central China's Hubei province, expressed his admiration for the lifestyle of beachcombing: You work at sunrise and rest at sunset, a stark contrast to nonstop urban hustle and bustle. But there's a catch. The seemingly idyllic life on the beach is filled with uncertainties.

Beachcombers never know what they will catch each day, whether will return empty-handed or with a bountiful harvest. An element of luck is part of the charm of nature, offering a sense of the primitive and facing the unknown.

"While modern times have reduced our survival pressures, life has become increasingly mundane and routine, like lines of code running smoothly day after day, lacking excitement. The activity of beachcombing brings us the element of surprise," Chen said.