ZTO Express (Cayman) Inc. ZTO earnings are anticipated to register growth of 2.3% and 23.3% in 2021 and 2022, respectively. Moreover, sales are expected to register growth of 27.6% and 19.8% in 2021 and 2022, respectively. Key Growth DriversStrong performance of the core express delivery services unit is encouraging. Notably, revenues in the unit increased 37.8% year over year in the first half of 2021, owing to rise in parcel volumes. ZTO Express anticipates parcel volumes in the range of CNY22.95-CNY23.80 billion for 2021, suggesting an increase of 35-40% from the figure reported in 2020.ZTO Express exited the second quarter with cash and cash equivalents of RMB 12.1 billion, higher than its short-term bank borrowings of $1.43 billion. This implies that the company has enough cash to pay off its short-term debt obligations.We are impressed with the company's efforts to reward shareholders despite the current uncertainties. As of Jun 30, 2021, ZTO Express repurchased 17.52 million ADSs at an average price of $23.17. The company paid out dividends worth $378,000 in the first half of 2021.Primary ConcernHigh SG&A expenses might increase operating expenses and hurt the bottom line. Apart from other factors, increases in salaries and accrued bonuses are leading to higher SG&A expenses. Evidently, SG&A expenses increased 16.2% year over year in the first half of 2021. Costs are likely to be high in the second half of 2021 as well, thanks to high SG&A expenses.Zacks Rank & Stocks to ConsiderZTO Express currently carries a Zacks Rank #3 (Hold).Some better-ranked stocks in the broader Zacks Transportation sector are Knight-Swift Transportation Holdings Inc. KNX, Landstar System, Inc. LSTR and Herc Holdings Inc. HRI. Knight-Swift and Landstar carry a Zacks Rank #2 (Buy), while Herc Holdings sports a Zacks Rank #1 (Strong Buy). You can see the complete list of today’s Zacks #1 Rank stocks here.Long-term expected earnings per share (three to five years) growth rate for Knight-Swift, Landstar and Herc Holdings is pegged at 15%, 12% and 49.2%, respectively. 5 Stocks Set to Double Each was handpicked by a Zacks expert as the #1 favorite stock to gain +100% or more in 2021. Previous recommendations have soared +143.0%, +175.9%, +498.3% and +673.0%. Most of the stocks in this report are flying under Wall Street radar, which provides a great opportunity to get in on the ground floor.Today, See These 5 Potential Home Runs >>Want the latest recommendations from Zacks Investment Research? Today, you can download 7 Best Stocks for the Next 30 Days. Click to get this free report KnightSwift Transportation Holdings Inc. (KNX): Free Stock Analysis Report Landstar System, Inc. (LSTR): Free Stock Analysis Report Herc Holdings Inc. (HRI): Free Stock Analysis Report ZTO Express Cayman Inc. (ZTO): Free Stock Analysis Report To read this article on Zacks.com click here.