Comet Neowise.

Pandemic

Waltz under the stars.

Sunset on Emei mountain.

Clouds embrace the mountain.

Sunrise.

A calm moring in PKU.

未名湖.

Revisit the old times.

I am a Ph.D. now!

A Ph.D. from Harvard.

Star trail

Perseid meteor shower

Sainte-Chapelle

Sainte-Chapelle

Paris

Travel alone in P aris

Paris

Avignon

Palace of the pope in the old city of Avignon.

The broken bridge

Provence

The blue shore

Nice

Memory of old times

Tree, tower and the lake.

Red bridge

Charles river at sunrise

Joshua tree national park

Caltech

Kate

LA downtown from Griffith Observatory

Jing

Snow plough

Snowing in the yard

Lift connecting the ski trails and condos

Sugarloaf mountain

Snowbrook under -15C

Riding into the stars

Follow the snowbrook to the mountains

DIY hackintosh

Manhattan cityscape

Central park

Time square

"Announcing a major science breakthrough"

Rain in the city

NYC outside the train window.

Trace of a Pumpkin

Siren trail

The boss and minions :)

Outing on a farm

Cozy places

Autumn colors in Mt Major

Superposition

Intricate structure of a hedge maze

Mid-Autumn Moon

Milky way above great smoky mountains

Cabin among stars

Milky way

Starry night on a lawn

仰望星空的人

Dreamy afternoon waiting for the eclipse

Preparing for the big moment

The eclipse: diamond ring

The eclipse: totality

Roaring fork (great smoky mountains)

Smoky mountains

Flare

Smoky mountains

Race point beach

Shining sea bikeway

Storm is coming

Provincetown

The BBQ

IllumiNation firework and laser show at EPCOT

Dragon on Gringottz bank

EPCOT

Fantasmic

New Orleans, where alcohol is allow outside

St. Patrick's day parade, New Orleans

Suspicious club in New Orleans

The Shrine of St. Anthony (Boston)

Candles in the church

Apple watch in display

镜面上印章

马踏印章

Measuring on Leiden at night

Trip to Acadia National Park

Outlook from Cadillac Mountain top in Acadia

The barbecue smoke

Where is the meat

Star night (Acadia National Park)

The dawn (Cadillac Mountain top)

Sunrise (Cadillac Mountain top)

雨过天晴 (Acadia National Park)

水龙头（都江堰）

山羊吃草（重庆）

晚饭后（重庆）

layers of mountains in a distance (Chongqing)

Lake on the mountain top (长白山天池)

Summer afternoon

Bee harvesting pollen (长白山度假区)

Silhouette

Water falls

North Korea building (seen across the border)

Broom (Universal studio)

Into dilution fridge (Kim Lab)

Bus trip in the rain

116th Broadway

Strangers

Central park